fix: keep object methods, accessors and computed keys in decorator metadata

[ashley-hunter]

Object literals in decorator metadata lost any member that is not a plain key: value pair. This is on 0.0.39 and main:

• { attach() {} } compiled to the invalid {attach:() {}}.
• get, set, async and * were lost.
• Computed keys were silently dropped.

No error was reported. The cause is convert_object_expression in output/oxc_converter.rs, which every re-emitted field goes through: providers, viewProviders, animations, NgModule and @Injectable metadata, and setClassMetadata.

• Such objects are now kept as written with TypeScript types stripped, as ngtsc does. Type stripping previously failed for objects because codegen drops the parentheses the unwrap relied on.
• An arrow returning such an object, () => ({ a() {} }), now keeps the parentheses around its body.
• Methods and accessors on a decorator's own options object, such as @Injectable({ useFactory() {} }) or @ViewChild('x', { get read() {} }), were read as values and emitted as invalid code. Like ngtsc's reflectObjectLiteral, they are now ignored.

When a component's resources are inlined, its metadata object in setClassMetadata is rebuilt from the plain properties only, matching ngtsc's transformDecoratorResources.

@Input options are evaluated rather than reflected, so ngc rejects @Input({ transform(v) {} }) with NG1010; oxc reports the same error.

Tests

• Integration tests cover member kinds across decorators and fields, arrow bodies, ignored option members (including signal input/model/output/viewChild options), BigInt keys, and a component that combines accessors with templateUrl. Expected output is taken from ngc 22.
• 30 comparison fixtures check the output against ngtsc. 29 of them fail on 0.0.39.
• A unit test covers type stripping for object fallbacks.

Compiling 2,678 decorated files from real-world Angular repos gives byte-identical output to main in both AOT and JIT mode, with no measurable change in compile time.

[Brooooooklyn]

Rebased onto main (conflict in directive/property_decorators.rs, where #495 had folded the three signal alias loops into options_alias — moved the new is_metadata_property check into that helper).

One test needed an update: test_methods_and_accessors_on_decorator_options_are_ignored used @Input({ transform(v: string) { return v; } }), which now reports the NG1010-style error from #494 (@Input decorator argument must resolve to a string or an object literal) — matching ngc, since @Input options are evaluated rather than reflected. Replaced it with a plain alias in the ignore test and added test_input_options_method_transform_is_an_error asserting the error. PR body updated accordingly.

All cargo test -p oxc_angular_compiler tests pass and pnpm compare --fixtures is green on the new object-members fixtures.