add basic github workflows

.github/workflows/detect-fixups.yml

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+name: Ukechords fixup detections
+
+on: [pull_request]
+
+jobs:
+  flag-fixups:
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Fetch target branch
+        env:
+          BASE: ${{ github['base_ref'] }}
+        run: git fetch --no-tags origin +refs/heads/${BASE}:refs/remotes/origin/${BASE}
+      - name: Fetch source branch
+        env:
+          HEAD: ${{ github['head_ref'] }}
+        run: git fetch --no-tags origin +refs/heads/${HEAD}:refs/remotes/origin/${HEAD}
+      - name: flag missing fixup/squash commits
+        env:
+          BASE: origin/${{ github['base_ref'] }}
+          HEAD: origin/${{ github['head_ref'] }}
+        run: tests/flag-autosquash "$BASE" "$HEAD"

.github/workflows/test.yml

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+name: Ukechords test execution
+
+on: [pull_request,push]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.x'
+      - name: setup flit
+        run: pip install flit
+      - name: install ukechords
+        run: flit install --extras dev
+      - name: Run flake8
+        run: flake8 .
+      - name: Run pylint
+        run: pylint . --recursive=yes
+      - name: Run mypy
+        run: mypy .
+      - name: Run tests
+        run: pytest .