Add shell and systemd linting

Author: Joe-Heffer-Shef

.github/workflows/lint-shell-scripts.yaml

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+# Lint shell scripts
+# https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions
+# https://github.com/marketplace/actions/shell-linter
+name: Lint shell scripts
+on: push
+jobs:
+  lint_shell:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: azohra/[email protected]
+        with:
+          severity: 'warning'
+          exclude-paths: 'LICENSE'

.github/workflows/lint-systemd.yaml

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+# GitHub Actions workflow for linting the systemd unit files
+# https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions
+name: Lint systemd units
+on: [ push ]
+jobs:
+  lint:
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install systemdlint
+        run: pip install systemdlint==1.*
+      - name: Lint systemd units
+        run: systemdlint ./config/systemd/*