Add new VSCode command to show syntax tree

editors/code/.gitignore

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 bin/
 LICENSE
+out/

editors/code/SYNTAX_TREE_USAGE.md

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+# VSCode Extension: Show Syntax Tree
+
+This extension adds a command `Roughly: Show Syntax Tree` that displays the AST (Abstract Syntax Tree) of the current R file.
+
+## Usage
+
+1. Open an R file in VSCode
+2. Use the command palette (Ctrl+Shift+P / Cmd+Shift+P)
+3. Type "Roughly: Show Syntax Tree"
+4. The AST will open in a new editor tab beside your current file
+
+## Example
+
+For an R file with content:
+```r
+# Test function
+hello <- function(name) {
+  paste("Hello", name)
+}
+
+result <- hello("World")
+```
+
+The command will show the AST structure with details about:
+- Program structure
+- Function definitions
+- Variables assignments
+- Function calls
+- Comments
+- And more...
+
+## Requirements
+
+- The `roughly` binary must be available (installed via the extension or in PATH)
+- The current file must be an R file (`.R` or `.r` extension)
+- The file must be saved to disk
+
+## Error Handling
+
+- Shows error if no active editor is found
+- Shows error if current file is not an R file
+- Shows error if file is not saved
+- Shows error if roughly binary fails to execute

editors/code/eslint.config.js

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+import js from '@eslint/js'
+import tseslint from 'typescript-eslint'
+
+export default tseslint.config(
+  js.configs.recommended,
+  ...tseslint.configs.recommended,
+  {
+    ignores: ['out/**', 'node_modules/**'],
+  },
+  {
+    files: ['src/**/*.ts'],
+    rules: {
+      '@typescript-eslint/no-unused-vars': 'warn',
+      '@typescript-eslint/no-explicit-any': 'warn',
+    },
+  }
+)