ci: Optimize CI by skipping lin presubmit on non-code changes

.github/workflows/lint.yaml

@@ -15,6 +15,11 @@
 name: lint
 on:
   pull_request:
+    paths-ignore:
+      - "docs/**"
+      - "**.md"
+      - ".github/**"
+      - "!.github/workflows/lint.yaml"
   pull_request_target:
     types: [labeled]
 

.github/workflows/lint_fallback.yaml

@@ -0,0 +1,35 @@
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: lint
+
+on:
+  pull_request:
+    paths:
+      - "docs/**"
+      - "**.md"
+      - ".github/**"
+      - "!.github/workflows/lint.yaml"
+
+permissions: read-all
+
+jobs:
+  lint:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Skip Lint
+        run: |
+          echo "Skipping lint for documentation/config-only changes."
+          echo "This job exists to satisfy the required status check."