fix(ci): checkout before using local actions

.github/actions/setup-dev/action.yml

@@ -34,5 +34,10 @@ runs:
       run: npm ci || { echo "❌ npm install failed" && npm install }
       shell: bash
 
-    - name: Setup Tree-sitter Environment
-      uses: ./.github/actions/setup-treesitter
+    - name: Install Tree-sitter CLI
+      run: npm install -g tree-sitter-cli
+      shell: bash
+
+    - name: Generate Grammar
+      run: npm run generate
+      shell: bash

.github/actions/setup-treesitter/action.yml

@@ -1,14 +0,0 @@
----
-name: "Setup Tree-sitter Environment"
-description: "Installs Tree-sitter CLI and generates grammar"
-
-runs:
-  using: "composite"
-  steps:
-    - name: Install Tree-sitter CLI
-      run: npm install -g tree-sitter-cli
-      shell: bash
-
-    - name: Generate Grammar
-      run: npm run generate
-      shell: bash