refactor: Split runtime tests into Reanimated and Worklets as a separate app-type

[tjzel]

Note

This PR description was AI-generated.

Stacked on #9927. Part 2 of the runtime-tests spec.

Summary

I split the runtime tests between Reanimated tests and Worklets tests and made them a separate app-type in common-app, similar to how the Reanimated and CSS apps are structured.

• I moved the test files into runtime-tests/reanimated/tests/ and runtime-tests/worklets/tests/ based on what each file actually imports: memory, runLoop, runtimes, and the worklets-only plugin tests (fileWorkletization, jsxInWorklets, versionMismatch) went to worklets/; animations, core, layoutAnimations, props, utilities, advancedAPI, StrictMode, the framework self-tests, and the plugin tests that use useSharedValue (contextObjects, workletClasses, recursion) went to reanimated/. Reanimated tests may freely use Worklets (Reanimated depends on it); Worklets tests import no Reanimated code.
• I decomposed the monolithic suite list from RuntimeTestsExample.tsx into reanimated/suites.ts and worklets/suites.ts, preserving every suite's enabled/commented/disabled/skipByDefault state and the existing TODO comments verbatim. The shared RuntimeTestSuite type lives in runtime-tests/types.ts with no imports, so suite registries don't pull the test framework (or Reanimated) into the module graph at app boot — this matters for the upcoming CLI auto-run part of the spec.
• I added a new Runtime Tests app-type (src/apps/runtime-tests/App.tsx) with a home screen that opens either the Reanimated or the Worklets test runner — one library at a time. It's registered in the drawer between CSS and Reanimated, and hidden on web (the old example entry had disabledPlatforms: [WEB]).
• I removed the RuntimeTestsExample entry from the Reanimated examples registry and deleted the now-decomposed RuntimeTestsExample.tsx.
• The ReJest framework itself still statically imports both libraries; isolating Worklets-only runs from Reanimated is deliberately left to the CLI-runner part of the spec.

Test plan

• yarn type:check:native in apps/common-app passes with zero errors.
• Manual: open the app → drawer → Runtime Tests → run Reanimated Tests and Worklets Tests separately (simulator verification to follow in the stacked manual-run PR).