Added some basic automatic security screening using cargo audit

.forgejo/workflows/cargo_audit.yaml

@@ -0,0 +1,26 @@
+---
+name: Cargo Audit
+
+on:
+  push:
+    paths:
+      - 'Cargo.toml'
+      - 'Cargo.lock'
+  schedule:
+    # Frinday evening 18:20
+    - cron: 20 18 0 0 5
+  workflow_dispatch:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  audit:
+    name: Audit
+    runs-on: docker
+    container:
+      image: codeberg.org/unobtanium/unobtanium-ci-builder:latest
+    steps:
+      - uses: https://codeberg.org/slatian/shell-ci-checkout@v1
+      - run: cargo audit
+