Upgrade TypeScript compiler to 7.0.2

[ConnorQi01]

Summary

Upgrade the build compiler to TypeScript 7.0.2 while keeping TypeScript 6.0.2 available exclusively for tooling that still depends on the legacy compiler JavaScript API.

Changes

• Use the official TypeScript 6 compatibility package as the root typescript dependency for ESLint and legacy tooling.
• Add typescript-7 as an npm alias to TypeScript 7.0.2 and invoke its CLI for project compilation.
• Remove unused root dependencies that cannot support TypeScript 7: @typescript/native-preview, gulp-typescript, ts-loader, and ts-node.
• Keep ESLint enabled; it now uses the compatible TypeScript 6 API instead of being skipped.
• Update the gulp and webpack compilation paths for the TS7 CLI and resolve affected CommonJS interop/import compatibility issues.
• Merge the latest master, including current dependency security fixes.
• Update the registered-command test expectation for the existing reactNative.publishToExpHost command.

Validation

• npm ci passed using the configured Microsoft npm proxy for registry packages and GitHub HTTPS for brace-expansion#v5.0.8.
• npm run build passed (including Prettier and ESLint: 0 errors; 158 existing warnings).
• node .\node_modules\typescript-7\bin\tsc --noEmit -p tsconfig.json --pretty false passed.
• npm test passed in the VS Code Extension Host.
• Pre-commit hooks passed.

Closes #2764