add actionlint for github actions to testing suite

.github/actionlint-matcher.json

@@ -0,0 +1,17 @@
+{
+  "problemMatcher": [
+    {
+      "owner": "actionlint",
+      "pattern": [
+        {
+          "regexp": "^(?:\\x1b\\[\\d+m)?(.+?)(?:\\x1b\\[\\d+m)*:(?:\\x1b\\[\\d+m)*(\\d+)(?:\\x1b\\[\\d+m)*:(?:\\x1b\\[\\d+m)*(\\d+)(?:\\x1b\\[\\d+m)*: (?:\\x1b\\[\\d+m)*(.+?)(?:\\x1b\\[\\d+m)* \\[(.+?)\\]$",
+          "file": 1,
+          "line": 2,
+          "column": 3,
+          "message": 4,
+          "code": 5
+        }
+      ]
+    }
+  ]
+}

.github/workflows/testing_pipelines.yaml

@@ -0,0 +1,33 @@
+# Copyright (C) 2012-2022 jrnl contributors
+# License: https://www.gnu.org/licenses/gpl-3.0.html
+
+name: Testing Pipeline Files
+
+on:
+  push:
+    branches: [ develop, release ]
+    paths:
+    - '.github/workflows/**'
+    - '.github/actions/**'
+  pull_request:
+    branches: [ develop ]
+    paths:
+    - '.github/workflows/**'
+    - '.github/actions/**'
+
+jobs:
+  test:
+    if: >
+      ! contains(github.event.head_commit.message, '[ci skip]')
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ ubuntu-latest ]
+    steps:
+      - run: git config --global core.autocrlf false
+      - uses: actions/checkout@v2
+      - name: Check workflow files
+        uses: docker://rhysd/actionlint:latest
+        with:
+          args: -color