Bump Node.js from 20.x to 22.17.0 and modernize CI/CD tooling

[Copilot]

This PR updates the development environment from Node.js 20.x to 22.17.0 and modernizes the CI/CD tooling across the project to align with current best practices and improve cross-platform compatibility.

Key Changes

Node.js Version Updates

• Updated Node.js version from 20.19.0 to 22.17.0 in all CI/CD workflows
• Updated GitHub Actions workflows (pr-check.yml, push-check.yml)
• Updated Azure Pipeline configurations (stable and pre-release)
• Updated @types/node from 16.x to 22.x for Node.js 22 compatibility

GitHub Actions Modernization

• Updated checkout action from v3 to v4
• Updated setup-node action from v3 to v4
• Updated setup-python action from v2 to v5
• Updated cache action from v3 to v4

Dependency Updates

• Updated TypeScript from 5.3.3 to 5.9.2
• Updated ESLint tooling (@typescript-eslint/eslint-plugin, @typescript-eslint/parser)
• Updated build tools (webpack, ts-loader, prettier)
• Updated testing dependencies (@vscode/test-electron, @vscode/vsce)
• Updated other dependencies for better compatibility and security

Cross-Platform Improvements

• Replaced emoji-based working directory names (🐍 🐛) with simple ASCII names (testingDir)
• This change improves reliability across different CI environments and avoids potential Unicode-related issues

Testing

All builds, linting, formatting, and packaging have been verified to work correctly with the new Node.js 22.x environment:

• ✅ TypeScript compilation passes
• ✅ ESLint validation passes
• ✅ Prettier formatting checks pass
• ✅ Webpack bundling works correctly
• ✅ VSIX package creation succeeds

The extension maintains full functionality while benefiting from the performance and security improvements in Node.js 22.x.

Fixes #347.

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[rzhao271]

Is this change intentional?

[eleanorjboyd]

yes- it doesn't work with the emojis anymore

[eleanorjboyd]

yes