Add support and documentation for a new interceptor type, Replace, which runs JavaScript instead of the default DB operation. Updates made across low-code docs:

- docs/en/low-code/interceptors.md: Document Replace semantics for Create/Update/Delete, add examples and model.json/type notes.
- docs/en/low-code/fluent-api.md: Expand AddInterceptor docs to list allowed name/type values and note Replace behavior; small attribute call-site change (DynamicPropertySetByClients(false)).
- docs/en/low-code/index.md: Simplify Getting Started by removing the package table and renumbering steps (register assembly, configure DbContext, define entity, add migration).
- docs/en/low-code/scripting-api.md: Remove db.getList entry from the scripting API table.

These changes clarify interceptor capabilities (Pre/Post/Replace) and streamline the quickstart instructions.

Replace "ABP Low-Code Module" with "ABP Low-Code System" across low-code documentation to reflect the naming change. Updated the doc-seo JSON descriptions and a couple of in-page references. Affected files: docs/en/low-code/custom-endpoints.md, docs/en/low-code/foreign-access.md, docs/en/low-code/interceptors.md, docs/en/low-code/model-json.md, docs/en/low-code/reference-entities.md, docs/en/low-code/scripting-api.md.

Clarify interceptor behavior in low-code docs: update fluent-api.md and interceptors.md to state that Replace Create interceptors must return the new entity's Id (Guid) so the system can fetch and return the created entity. Added an example showing `return result.Id;` after `db.insert(...)`, and noted that Replace-Update and Replace-Delete do not need to return a value.

Expand Low-Code documentation:

- Custom Endpoints: added request/headers/params variables, many response helpers (created, noContent, unauthorized, forbidden, error, response) and logging helpers.
- Fluent API: added Enum localization section, switched to property-based API names (DefaultDisplayPropertyName, AddOrGetProperty, etc.), added examples for chaining, foreign keys and interceptors, and generic Configure<T> usage.
- Index: documented Export (Excel/CSV) flow and endpoints, plus Custom Commands/Queries usage and discovery; clarified DynamicEntityAppService and UI app service methods.
- Interceptors & Scripting API: expanded context.commandArgs, context.currentUser and context.emailSender surfaces; added logging methods; added db.exists and updated available scripting methods.
- model.json: added validator examples and a comprehensive validator table (url, phone, regularExpression, range, min/max, etc.).
- reference-entities: removed a couple of reference rows (IdentityRole, Tenant).

These edits improve developer guidance and add examples for using the low-code features.

Reflect API and copy updates in low-code docs. foreign-access.md: replace ConfigureProperty/SetForeignKey example with entity.AddOrGetProperty and assignment of a ForeignKeyDescriptor (EntityName, DisplayPropertyName, Access). index.md: minor wording tweaks for clarity and a corrected link anchor to the three-layer configuration system. model-json.md: remove the empty "foreignKeys" array from the entity JSON example to avoid implying it's required.

Update Low-Code docs to introduce a Low-Code Initializer pattern and model.json hot-reload support. Shows using DynamicEntityAssemblyInfo with rootNamespace and projectRootPath, adds a parameter table, and replaces simple assembly registration with an AsyncOneTimeRunner-based InitializeAsync that registers reference entities, assemblies, optional fluent API configs, and calls DynamicModelManager.Instance.InitializeAsync(). Adds a ResolveDomainSourcePath helper, guidance to call the initializer from Program.cs (and DbMigrator/other entry points) before building the app, and notes fallback to embedded resources when projectRootPath is empty.

Update low-code documentation examples to reflect API changes: make entity classes inherit DynamicEntityBase across examples, remove the separate "Register the Assembly" step and renumber steps, and introduce an async low-code initializer (MyAppLowCodeInitializer) using AsyncOneTimeRunner and DynamicModelManager.Instance.InitializeAsync. Also adjust command/query examples: CustomProductCreateCommand now derives from CreateCommand<Product> and returns Guid, and a CustomQuery (Single) example was added. These edits align docs with the new initialization flow and base entity type.

Improve Low-Code docs to clarify the distinction between dynamic entities and reference entities and to tighten foreign-access semantics. Updates across fluent-api, foreign-access, index, model-json, reference-entities, and scripting-api: explain that foreign access applies only between dynamic entities and that action menus appear on the target entity's UI; adjust wording for source/target terminology and permission behavior; add a comparison table for dynamic vs reference entities; update the reference-entity registration example to an async initializer pattern and show DynamicModelManager initialization; and note in the scripting API that insert/update/delete only apply to dynamic entities. These changes are editorial to reduce confusion around read-only reference entities and foreign key behavior.

Add seven illustrative screenshots to docs/en/low-code/images (actions-menu.png, create-modal.png, data-grid.png, foreign-access-modal.png, interceptor-error.png, menu-items.png, quick-look.png) and update docs/en/low-code/index.md to include references to the menu, data grid, and create/edit modal images to better demonstrate the Low-Code UI features.

Update low-code Fluent API docs: add docs/en/images/quick-look.png and refactor examples to use DynamicEntityBase for entities. Remove the separate assembly registration step and replace the ConfigureServices sample with a Low-Code initializer (MyAppLowCodeInitializer) that uses AsyncOneTimeRunner and an async InitializeAsync which calls DynamicModelManager.Instance.InitializeAsync(). Also adjust step numbering and small samples to reflect these API changes (add server-only/internal property, set UI descriptors, etc.).

Remove docs/en/images/quick-look.png and replace/update the image at docs/en/low-code/images/quick-look.png. Consolidates the quick-look asset into the low-code subdirectory and updates the binary image file.

Replace setting CommandName property with the CommandInterceptorDescriptor(string) constructor in examples. Updated docs/en/low-code/fluent-api.md and docs/en/low-code/interceptors.md to pass "Create" and "Delete" as constructor arguments to simplify and clarify interceptor declarations; no functional change to behavior.