chore: add support for react-native@0.87.0-rc.3 - #4375

Upgrade based on the RN upgrade helper:

https://react-native-community.github.io/upgrade-helper/?from=0.86.0&to=0.87.0-rc.3

Closes:

software-mansion/react-native-screens-labs#1666

- Bumped RN.packages to `0.87.0-rc.3` and TypeScript to TS6
- Bumped AGP on Android to 9
- Bumped `react-native-safe-area-context` to 5.8.0 -

https://github.com/AppAndFlow/react-native-safe-area-context/releases/tag/v5.8.0
- the PR released in this version is fixing the build error for symbols
that were removed in RN 0.87.

- In RN 0.87's generated types, `View` is a function component, so
`React.Ref<View>` / `useRef<View>` no longer describe a host instance.
All ref sites (e.g., `Screen`, `ScreenStackItem`,
`ScreenStackHeaderConfig`) now use the public `ViewInstance` type.
- RN 0.87's real types live under the `types_generated/` (treated as
non-public) path, so any *inferred* exported type referencing them fails
`.d.ts` emit during `npm pack` (`bob build`). Fixes:
- `as HostComponent<NativeProps>` on ~30 `codegenNativeComponent`
default exports (`HostComponent` is publicly exported; other libs are
following that pattern with an explicit cast:

https://github.com/software-mansion/react-native-reanimated/blame/4.5.3/packages/react-native-reanimated/src/specs/SharedTransitionBoundaryNativeComponent.ts#L9-L12
- Nominal instance interfaces for `forwardRef` components (`export
interface ScreenInstance extends ViewInstance {}`, same for
`ScreenStackHeaderConfigInstance`) - inference stops at a nominal
interface, so the fix propagates without further annotations (was
resolving to `ReactNativeElement`, which is a non-public type from RN)
- Exported `TransitionProgressContextBody` and used it as the explicit
return type of `useTransitionProgress`.
- Set `rootDir: "./src"` in `tsconfig.build.json`
- `moduleResolution: "bundler"`, dropped `baseUrl`.** `bundler`
resolution is required to resolve RN 0.87's `exports`-based type entry
points; `baseUrl` is deprecated in TS 6 and the `paths` mappings work
relative to the config without it. For more context, see:
microsoft/TypeScript#62508
- Restored the removed `TextInputFocusEventData`. RN changed the
exported type to `TextInputFocusEvent` (now the full
`NativeSyntheticEvent`). A local backward-compat interface is
introduced.

- Migrated from `forwardRef` to React 19 ref-as-prop
- Retyped the internal ref against the native host instance
(`React.ComponentRef<typeof SearchBarNativeComponent>`) instead of the
previous double-casted `NativeSearchBar` wrapper.

- Added missing `_props` default initializers to Fabric component views
(e.g., `RNSScreenContentWrapper`). `RCTViewComponentView`'s
`updateProps:oldProps:` asserts in debug builds that every subclass
initializes `_props` with its own concrete default props in its
initializer, starting from 0.87.

- AGP 9 has built-in Kotlin support.
- AGP 9 compiles Kotlin itself by default, and additionally applying
`kotlin-android` plugin fails the build - so the plugin is now applied
only when built-in Kotlin is inactive (AGP < 9, or the consumer opted
out via `android.builtInKotlin=false`).
- Registered `src/fabric/java` in the Kotlin source set so the Fabric
sources compile under built-in Kotlin.

N/A

- `yarn check-types` - passed
- `npm pack` - passed
- codegen was verified
- `FabricExample` - built and run on iOS and Android.
- Checked the compatibility with the lowest supported RN version (0.84)

Action items yet to be covered:
- test it with SwiftPM
- full testing coverage of the most important components on (0.84, 0.87)
x (Android, iOS) x (Debug, Release) combos
- more FabricExample testing - both Debug and Release
- consider adding some commit-level check for detecting issues related
to non-public types and TS inference.

- [ ] Included code example that can be used to test this change.
- [ ] For visual changes, included screenshots / GIFs / recordings
documenting the change.
- [ ] For API changes, updated relevant public types.
- [ ] Ensured that CI passes

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Co-authored-by: Hur Ali <hurali97@gmail.com>
(cherry picked from commit 7708a4a)

Co-authored-by: Hur Ali <hurali97@gmail.com>