Changes Made

1. Settings Extension: Added a new setting defaultStatusForNewNotes to the PluginSettings interface and initialized it to null.
2. Settings UI: Added a "Default status for new notes" dropdown in the Behaviour settings section. This dropdown is populated with all currently enabled statuses
   (from both templates and custom statuses).
3. Note Creation Listener: Integrated a new event listener in main.tsx that monitors the creation of markdown files. When a new note is created:
   • It waits briefly (500ms) to allow Obsidian and other plugins (like Templater) to finish initializing the file.
   • It checks if the note already has a status.
   • If no status is found, it automatically applies the configured default status.
4. Synchronization: Added the new setting to the "Workflow" synchronization group so it can be synced across devices.
5. Refactoring & Cleanup: Fixed minor mixed spaces and tabs issues in the settings type definitions that were causing lint errors