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>

language-configuration.json

@@ -0,0 +1,18 @@
+{
+  "comments": {
+    "lineComment": "#",
+    "blockComment": ["/*", "*/"]
+  },
+  "brackets": [
+    ["{", "}"],
+    ["[", "]"],
+    ["(", ")"]
+  ],
+  "autoClosingPairs": [
+    { "open": "{", "close": "}" },
+    { "open": "[", "close": "]" },
+    { "open": "(", "close": ")" },
+    { "open": "\"", "close": "\"" },
+    { "open": "'", "close": "'" }
+  ]
+}