GitHub: add PR conflict and author assignment workflows

.github/reviewers.yml

@@ -0,0 +1,19 @@
+---
+docker-vyos/**:
+  - sever-sever
+  - DmitriyEshenko
+
+vars/**:
+  - c-po
+  - UnicronNL
+
+.github/**:
+  - c-po
+  - dmbaturin
+  - UnicronNL
+
+'**':
+  - c-po
+  - dmbaturin
+  - jestabro
+  - UnicronNL

.github/workflows/auto-author-assign.yml

@@ -0,0 +1,27 @@
+name: "PR Triage"
+on:
+  pull_request_target:
+    types: [opened, reopened, ready_for_review, locked]
+
+permissions:
+  pull-requests: write
+
+jobs:
+  # https://github.com/marketplace/actions/auto-author-assign
+  assign-author:
+    runs-on: ubuntu-latest
+    steps:
+      - name: "Assign Author to PR"
+        uses: toshimaru/auto-author-assign@v1.3.5
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+
+  # https://github.com/shufo/auto-assign-reviewer-by-files
+  assign_reviewer:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Request review based on files changes and/or groups the author belongs to
+        uses: shufo/auto-assign-reviewer-by-files@v1.1.1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          config: .github/reviewers.yml

.github/workflows/pr-conflicts.yml

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+name: "PR Conflicts checker"
+on:
+  pull_request_target:
+    types: [synchronize]
+
+jobs:
+  Conflict_Check:
+    name: 'Check PR status: conflicts and resolution'
+    runs-on: ubuntu-18.04
+    steps:
+      - name: check if PRs are dirty
+        uses: eps1lon/actions-label-merge-conflict@releases/2.x
+        with:
+          dirtyLabel: "state: conflict"
+          removeOnDirtyLabel: "state: conflict resolved"
+          repoToken: "${{ secrets.GITHUB_TOKEN }}"
+          commentOnDirty: "This pull request has conflicts, please resolve those before we can evaluate the pull request."
+          commentOnClean: "Conflicts have been resolved. A maintainer will review the pull request shortly."