ci: add tree-sitter-cli installation

Author: kristijanhusak

.github/workflows/luarocks.yml

@@ -23,6 +23,10 @@ jobs:
         uses: rlalik/setup-cpp-compiler@master
         with:
           compiler: clang-latest
+      - name: Install tree-sitter CLI
+        uses: baptiste0928/cargo-install@v3
+        with:
+          crate: tree-sitter-cli
       - name: Install Lua
         uses: leso-kn/gh-actions-lua@master
         with: