Add Trivy scan workflow for vulnerability scanning

Signed-off-by: litebito <3867999+litebito@users.noreply.github.com>

.github/workflows/trivy_scan

@@ -0,0 +1,34 @@
+name: Trivy scan
+on:
+  pull_request:
+    branches: 
+      - main
+  push:
+    branches:
+      - main
+  schedule:
+    - cron: '0 0 * * *'
+
+
+jobs:
+  scan:
+    name: scan
+    runs-on: [self-hosted, linux, x64, repo-airsonic-pulse]
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v5
+
+      - name: Run Trivy vulnerability scanner
+        uses: aquasecurity/trivy-action@0.33.0
+        with:
+          scan-type: 'fs'
+          format: 'sarif'
+          ignore-unfixed: true
+          output: 'trivy-results.sarif'
+          severity: 'CRITICAL'
+
+      - name: Upload Trivy scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v3
+        if: always()
+        with:
+          sarif_file: 'trivy-results.sarif'