Update Language Server Protocol

[coliff]

• Old: vscode-languageclient@3.5.1 & vscode-languageserver@3.5.1
• New: vscode-languageclient@9.0.1 & vscode-languageserver@9.0.1

What was fixed:
✅ Dependencies: Updated all LSP packages to version 9.x
✅ Breaking Changes: Fixed all API changes (imports, connection setup, TextDocuments, etc.)
✅ Missing Dependencies: Added vscode-languageserver-textdocument@^1.0.12
✅ Extension Configuration: Fixed activation events to be more specific
✅ Build Process: Updated bundle-dependencies script
✅ Code Quality: Removed deprecated APIs and modernized the codebase

Benefits you'll get from LSP 9.x:
🚀 Better Performance: More efficient client-server communication
🔧 Modern APIs: Access to latest Language Server Protocol features
🛡️ Better Error Handling: Improved debugging and error reporting
🔄 Future-Proof: Ongoing support and updates
📊 Enhanced Diagnostics: Better linting feedback

The extension should now work faster and more reliably with HTML files, providing the same great HTMLHint linting experience with the modern LSP infrastructure underneath

[gemini-code-assist]

Code Review

The pull request updates the Language Server Protocol (LSP) dependencies to version 9.x, addressing breaking API changes, missing dependencies, extension configuration, and build processes. The update aims to improve performance, provide access to modern APIs, enhance error handling, and ensure future support.

[gemini-code-assist]

Consider extracting the platform-specific path conversion to a separate function for better readability and maintainability.

    let uri = document.uri;
    // Convert URI to file path manually since Files API is not available
    let fsPath = uri.replace(/^file:\/\//, "");
    if (process.platform === "win32" && fsPath.startsWith("/")) {
      fsPath = fsPath.substring(1);
    }

[gemini-code-assist]

The engine constraint has been updated. Ensure that this change aligns with the project's supported Node.js versions.

    "node_modules/vscode-jsonrpc": {
      "version": "8.2.0",
      "resolved": "https://registry.npmjs.org/vscode-jsonrpc/-/vscode-jsonrpc-8.2.0.tgz",
      "integrity": "sha512-C+r0eKJUIfiDIfwJhria30+TYWPtuHJXHtI7J0YlOmKAo7ogxP20T0zxB7HZQIFhIyvoBPwWskjxrvAtfjyZfA==",
      "engines": {
        "node": ">=14.0.0"