…Gen impls

We've had multiple bugs where new fields were added to AST structs but
the codegen `Gen`/`GenExpr` implementations forgot to handle them
(e.g., #20124 `declare` for TSInterfaceDeclaration, #20125 parens for
TSNonNullExpression, #20127 type_arguments for JSXOpeningElement,
#20128 type for TSImportEqualsDeclaration). These bugs are silent —
the code compiles fine but produces incorrect output.

This test uses `syn` to parse AST struct definitions and cross-reference
them against the codegen `Gen`/`GenExpr` implementations, detecting any
struct fields that are never accessed. It catches:

- Direct `self.field` accesses in Gen/GenExpr impl blocks
- Field accesses via helper functions (e.g., `print_if(stmt: &IfStatement)`)
- Field accesses through enum wrapper match arms (e.g., `Binaryish::Binary(e) => e.left`)

Fields that are intentionally not printed (internal metadata like `node_id`,
`scope_id`, or fields accessed via methods like `as_str()`) are tracked in
explicit skip lists with comments explaining why.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

### 🚀 Features

- e8547cc parser: Report error for using declarations in ambient
contexts (#19934) (camc314)
- 8345318 allocator: Add methods for boxed slices `ArenaBox<[T]>`
(#19968) (overlookmotel)
- f83be30 allocator: Add `Vec::push_fast` method (#19959)
(overlookmotel)

### 🐛 Bug Fixes

- 291d867 transformer_plugins: Unwrap ChainExpression after define
replacement removes optional markers (#20058) (IWANABETHATGUY)
- 36b2e56 codegen: Print type for TSImportEqualsDeclaration (#20128)
(camc314)
- 5a246ec codegen: Print type arguments for JSXOpeningElement (#20127)
(camc314)
- a40870e codegen: Preserve parens for TSNonNullExpression (#20125)
(camc314)
- ae830b2 codegen: Print `declare` for `TSInterfaceDeclaration` (#20124)
(camc314)
- 92cfb14 linter/plugins: Fix types for `walkProgram` and
`walkProgramWithCfg` (#20081) (overlookmotel)
- ee0491e apps,napi: Explicitly specify libs in tsconfigs (#20071)
(camc314)
- 588009e codegen: Print `static` keyword for TSIndexSignature (#19755)
(Dunqing)
- 5a8799c codegen: Print `with_clause` for `ExportNamedDeclaration`
(#20002) (Dunqing)
- 7502afe parser: Correct capacity for tokens `Vec` (#19967)
(overlookmotel)

### ⚡ Performance

- 4ea8f9a napi: Remove `napi_build::setup()` from `oxc_napi` to avoid
redundant rebuilds (#20094) (Boshen)
- 2baa5fb napi: Unify build-test profile to coverage for cache sharing
(#20090) (Boshen)
- 8ba61dd parser: Make pushing tokens faster (#19960) (overlookmotel)

Co-authored-by: Boshen <1430279+Boshen@users.noreply.github.com>