Add GitHub Actions workflow to run xUnit tests on push/PR

.github/dependabot.yml

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+version: 2
+
+updates:
+  - package-ecosystem: nuget
+    directory: /
+    schedule:
+      interval: weekly
+      day: monday
+    open-pull-requests-limit: 10
+    labels:
+      - dependencies
+      - security
+
+  - package-ecosystem: npm
+    directory: /
+    schedule:
+      interval: weekly
+      day: monday
+    open-pull-requests-limit: 5
+    labels:
+      - dependencies
+      - security
+
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly
+      day: monday
+    open-pull-requests-limit: 5
+    labels:
+      - dependencies
+      - ci

.github/workflows/codeql.yml

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+name: CodeQL
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  schedule:
+    - cron: "0 6 * * 1"
+
+permissions:
+  security-events: write
+  contents: read
+
+jobs:
+  analyze:
+    name: CodeQL Analysis
+    runs-on: windows-latest
+
+    steps:
+      # actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
+
+      # github/codeql-action/init@v3
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@480db559a14342288b67e54bd959dd52dc3ee68f
+        with:
+          languages: csharp
+          queries: security-extended
+
+      # github/codeql-action/autobuild@v3
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@480db559a14342288b67e54bd959dd52dc3ee68f
+
+      # github/codeql-action/analyze@v3
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@480db559a14342288b67e54bd959dd52dc3ee68f
+        with:
+          category: "/language:csharp"

.github/workflows/security-scan.yml

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+name: Security Scan
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+  security-events: write
+
+jobs:
+  gitleaks:
+    name: Secret Scanning
+    runs-on: ubuntu-latest
+
+    steps:
+      # actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
+        with:
+          fetch-depth: 0
+
+      # gitleaks/gitleaks-action@v2
+      - name: Run Gitleaks
+        uses: gitleaks/gitleaks-action@dcedce43c6f43de0b836d1fe38946645c9c638dc
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  semgrep:
+    name: Semgrep SAST
+    runs-on: ubuntu-latest
+
+    container:
+      image: semgrep/semgrep
+
+    steps:
+      # actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
+
+      - name: Run Semgrep
+        run: semgrep scan --config "p/csharp" --config "p/secrets" --config "p/owasp-top-ten" --config "p/javascript" --sarif --output semgrep-results.sarif
+
+      # github/codeql-action/upload-sarif@v3
+      - name: Upload Semgrep SARIF
+        uses: github/codeql-action/upload-sarif@480db559a14342288b67e54bd959dd52dc3ee68f
+        if: always()
+        with:
+          sarif_file: semgrep-results.sarif
+          category: semgrep

.github/workflows/test.yml

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+name: Tests
+
+on:
+  push:
+    branches: ["*"]
+  pull_request:
+    branches: [main, master]
+
+jobs:
+  test:
+    runs-on: windows-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Restore packages
+        run: dotnet restore
+
+      - name: Build
+        run: dotnet build -c Release --no-restore
+
+      - name: Run tests
+        run: dotnet test src/SimSteward.Plugin.Tests/SimSteward.Plugin.Tests.csproj -c Release --no-build --logger trx --results-directory TestResults -v normal
+
+      - name: Upload test results
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: test-results
+          path: TestResults/