docs: add tree-sitter grammar and comprehensive editor support (#200)

* docs: add tree-sitter grammar and editor support documentation

- Add comprehensive Editor Support section to README.md
- Document tree-sitter-toon grammar with usage examples
- Include VS Code extension information
- Add Neovim configuration example for tree-sitter
- Update tools-and-playgrounds.md with detailed editor support
- Add Editor Support to table of contents

Resolves #143
Resolves #99

* docs: simplify

---------

Co-authored-by: Johann Schopplich <mail@johannschopplich.com>

docs/ecosystem/tools-and-playgrounds.md

@@ -19,13 +19,27 @@ npx @toon-format/cli input.json --stats -o output.toon
 
 ## Editor Support
 
-TOON syntax highlighting is available for popular editors:
+### VS Code
 
-- **VS Code**: Use YAML syntax highlighting as a close approximation (`.toon` files can be associated with YAML language mode).
-- **Vim/Neovim**: [toon.nvim](https://github.com/thalesgelinger/toon.nvim)
+[TOON Language Support](https://marketplace.visualstudio.com/items?itemName=vishalraut.vscode-toon) - Syntax highlighting, validation, conversion, and token analysis.
 
-> [!NOTE]
-> Native TOON syntax highlighting extensions are in development. Contributions welcome!
+Install from the [VS Code Marketplace](https://marketplace.visualstudio.com/items?itemName=vishalraut.vscode-toon) or via command line:
+
+```bash
+code --install-extension vishalraut.vscode-toon
+```
+
+### Tree-sitter Grammar
+
+[tree-sitter-toon](https://github.com/3swordman/tree-sitter-toon) - Grammar for Tree-sitter-compatible editors (Neovim, Helix, Emacs, Zed).
+
+### Neovim
+
+[toon.nvim](https://github.com/thalesgelinger/toon.nvim) - Lua-based plugin for Neovim.
+
+### Other Editors
+
+Use YAML syntax highlighting as a close approximation. Most editors allow associating `.toon` files with YAML language mode.
 
 ## Web APIs