fix(types): support ImageRequireSource in ReactVideoSource (#4901)

[vanhci]

Fix: TypeScript type bug in ReactVideoSource (#4901)

Problem: React Native asset require() returns ImageRequireSource (a number), but ReactVideoSource type only accepted string | NodeRequire. The runtime code in Video.tsx already handles numeric asset ids at both source positions, but the TS type didn't reflect this.

Fix: Widen ReactVideoSource to also accept ImageRequireSource directly, matching the documented runtime behavior and the README example.

// Before
export type ReactVideoSource = Readonly<
  Omit<ReactVideoSourceProperties, 'uri'> & {
    uri?: string | NodeRequire;
  }
>;

// After  
export type ReactVideoSource =
  | ImageRequireSource
  | Readonly<
      Omit<ReactVideoSourceProperties, 'uri'> & {
        uri?: string | ImageRequireSource;
      }
    >;

Changed file: src/types/video.ts (support/6.x.x branch)

Testing: This is a pure type-only change. The runtime behavior is already correct (the code in Video.tsx already handles typeof _source === 'number' and typeof _source.uri === 'number').

Fixes #4901