For #25999 - Add GitHub actions to tag milestones, link issues and reopen issues for QA

.github/PULL_REQUEST_TEMPLATE

@@ -6,8 +6,17 @@
 - [ ] **Screenshots**: This PR includes screenshots or GIFs of the changes made or an explanation of why it does not
 - [ ] **Accessibility**: The code in this PR follows [accessibility best practices](https://github.com/mozilla-mobile/shared-docs/blob/master/android/accessibility_guide.md) or does not include any user facing features. In addition, it includes a screenshot of a successful [accessibility scan](https://play.google.com/store/apps/details?id=com.google.android.apps.accessibility.auditor&hl=en_US) to ensure no new defects are added to the product.
 
+### QA
+<!-- Before submitting the PR, please address each item -->
+- [ ] **QA Needed**
+
 ### To download an APK when reviewing a PR:
 1. click on Show All Checks,
 2. click Details next to "Taskcluster (pull_request)" after it appears and then finishes with a green checkmark,
 3. click on the "Fenix - assemble" task, then click "Run Artifacts".
 4. the APK links should be on the left side of the screen, named for each CPU architecture
+
+### GitHub Automation
+<!-- Do not add anything below this line -->
+
+Used by GitHub Actions.

.github/workflows/issue-linker.yml

@@ -0,0 +1,21 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/
+
+name: Issue Linker
+
+on:
+  pull_request_target:
+    branches:
+      - main
+
+jobs:
+  issue_linker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Issue Linker
+        uses: gabrielluong/issue-linker@1.0.0
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          commit-regexp: "#(\\d+)+"
+          section: "### GitHub Automation"

.github/workflows/milestone.yml

@@ -0,0 +1,20 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/
+
+name: Tag Milestone
+
+on:
+  issues:
+    types:
+      - closed
+
+jobs:
+  milestone:
+    runs-on: ubuntu-latest
+    if: github.actor == 'mergify[bot]'
+    steps:
+      - name: Tag Milestone
+        uses: gabrielluong/milestone@1.0.0
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/qa-needed.yml

@@ -0,0 +1,22 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/
+
+name: QA Needed
+
+on:
+  pull_request_target:
+    branches:
+      - main
+
+jobs:
+  qa_needed:
+    runs-on: ubuntu-latest
+    steps:
+      - name: QA Needed
+        uses: gabrielluong/qa-needed@1.0.1
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          label: "eng:reopen-for-qa"
+          check-regexp: "- \\[([ xX]?)\\] \\*\\*QA Needed\\*\\*"
+          commit-regexp: "#(\\d+)+"

.github/workflows/reopen-for-qa-needed.yml

@@ -0,0 +1,21 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/
+
+name: Reopen for QA Needed
+
+on:
+  issues:
+    types:
+      - closed
+
+jobs:
+  reopen_qa_needed:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Reopen for QA Needed
+        uses: gabrielluong/reopen-for-qa-needed@1.0.0
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          reopen-label: "eng:reopen-for-qa"
+          qa-label: "eng:qa:needed"