Add workflow to run the playground action with dispatch (#372)

Author: canercidam

.github/workflows/playground-action.yaml

@@ -0,0 +1,18 @@
+name: playground-action
+
+on:
+  workflow_dispatch:
+
+jobs:
+  run-builder-playground-action:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Run builder-playground
+        uses: flashbots/builder-playground-action@v1
+        with:
+          version: latest
+          detached: false
+          recipe: l1
+          args: --timeout 5s