Adds doc (but no navigation entry) for router resources. Feature not released yet
but getting documentation in place.

help.github.com/ignore-files/ 404s since GitHub retired that domain.

…syntax errors

When `@Component.deferredImports` maps blocks to arrays of dependencies, an explicitly
deferred dependency might be defined in multiple blocks (e.g. `block1: [CmpA], block2: [CmpA]`).
Previously, these were appended to the `explicitlyDeferredTypes` array without deduplication.
When generating the `setClassMetadataAsync` wrapper for development mode, the compiler
used this array to generate callback parameters for dynamic imports. This resulted in
duplicate parameter names in the callback signature `(CmpA, CmpA) => { ... }`, which
causes an `Uncaught SyntaxError` when V8 parses the module in strict mode.
This commit deduplicates `explicitlyDeferredTypes` in the `ngtsc` component handler, and
adds a secondary deduplication check in the `r3_class_metadata_compiler` generator to
ensure duplicate parameter names are never emitted.

Foreign components imported via foreignImports and created by the
ɵɵforeignComponent instruction were previously rendered eagerly in the
creation phase (rf & 1) of the template. This restricted which
properties could be passed to foreign component props, as parent-bound
inputs (@input(), input(), input.required()), properties initialized in
ngOnInit(), and pull-based view queries (viewChild()) were not yet
initialized at creation time.

This change defers foreign component rendering to run as a view effect
during the update pass:
- Update ɵɵforeignComponent in core to schedule component rendering via
  createViewEffect (executed in runEffectsInView during refreshView),
  executed with setActiveConsumer(null) to prevent reactive context
  leakage and destroyed immediately upon first execution.
- Update ɵɵforeignComponent to strictly accept props as a factory function
  (() => props) or null.
- Update the compiler template pipeline to wrap foreign component props
  in an arrow function closure (() => ({ ... })).
- Hoist creation-time foreign content projection instructions
  (ɵɵforeignContent, ɵɵforeignContentFn) into creation-phase variable
  declarations before ɵɵforeignComponent so creation-time context is
  captured safely.

help.github.com/ignore-files/ 404s since GitHub retired that domain. Five of the
files still linked to it over plain http as well.

See associated pull request for more information.

jsperf.com now returns 410 for every benchmark. Two of them still exist on the
successor site and are repointed at jsperf.app; the other five are gone, so the
links are removed and the performance claims they backed are kept.

See associated pull request for more information.

Updated Angular adev cross repo docs files.