chore: ci fmt checks

.github/actions/prepare/action.yml

@@ -0,0 +1,16 @@
+name: Prepare
+
+description: Checkout and install dependencies
+
+runs:
+  using: composite
+  steps:
+    - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
+      with:
+        node-version: 24
+
+    - uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
+
+    - name: Install Dependencies
+      run: pnpm i --frozen-lockfile
+      shell: bash

.github/workflows/checks.yml

@@ -0,0 +1,23 @@
+name: Checks
+
+on:
+  pull_request:
+
+jobs:
+  format:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - name: Prepare
+        uses: ./.github/actions/prepare
+      - name: Format
+        run: pnpm fmt:check
+
+  may-merge:
+    needs: ["format"]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Cleared for merging
+        run: echo OK