Dependency audit and upgrade as needed - #942

Related issue: #941

Changes in this PR:

• remove react-compiler-runtime from dev dependencies, since the compiler runtime is built into React 19
• update @types/react from the fixed 18.3.5 to ^19.0.0 to match React 19
• upgrade @testing-library/jest-dom from v5 to v6
  • update jest.setup.js to import @testing-library/jest-dom directly, because the extend-expect sub-path was removed in v6
• upgrade jest, babel-jest, and @types/jest from v26 (EOL) to v29
  In Jest 26, jsdom was the built-in default test environment and it simulated a browser DOM automatically, so window, document, etc. in unit tests were always available without any configuration. But, from jest 27;
  • the default testEnvironment was switched from jsdom to node - meaning tests run in a plain Node.js environment with no DOM by default, which requires setting testEnvironment: 'jest-environment-jsdom' in jest.config.js
  • jest-environment-jsdom was extracted into a separate package, so it must be explicitly installed