Initial commit - UCXL VS Code extension

- Added UCXL VS Code extension with syntax highlighting
- Implemented language configuration and grammar definitions
- Created extension package with examples and documentation
- Added syntax highlighting for UCXL code structures

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -0,0 +1,27 @@
+# UCXL Syntax + Linter
+
+Highlights and lints UCXL addresses anywhere in your files.
+
+## Features
+- Syntax colouring for UCXL scheme, agent, topic, project, context, temporal segments, and path
+- Inline linting for invalid UCXL syntax with red squiggly underlines
+- Hover tooltips showing parsed components
+
+## Install
+1. Clone this repo
+2. Install `vsce` if you don’t have it:
+   ```bash
+   npm install -g vsce
+
+
+Then you can see the syntax-colouring in action right here by reading this file and hovering over:
+
+
+ucxl://AB001:dev@project:task/~~/policies/linting/details.md
+
+
+```
+
+   ucxl://F0131:finance@project:any/~~/policies/linting/details.md
+
+```