v22.0.0

What's Changed

• Bump minimum Node.js version to >=22
• CI matrix updated to Node 22 and 24 across all platforms
• Migrated npm publishing to OIDC Trusted Publishing
• Migrated test framework from mocha/ts-node to node:test/tsx
• Added proper resource cleanup (gRPC channels, cache timers) with close()/disconnect() methods
• Cleaned up tsconfig.json (removed deprecated options, added rootDir)
• Updated @gibme/cache and @gibme/fetch to ^22.0.0
• Removed mocha, @types/mocha, ts-node, cross-env dependencies
• Improved README with comprehensive API documentation and subpath imports
• Bumped GitHub Actions to latest versions (checkout@v4, setup-node@v4)