Add TruffleHog secret scan workflow

.github/workflows/secret-scan.yml

@@ -0,0 +1,36 @@
+######################################################################
+# @CCOSTAN - Follow Me on X
+# For more info visit https://www.vcloudinfo.com/click-here
+# Original Repo : https://github.com/CCOSTAN/Home-AssistantConfig
+# -------------------------------------------------------------------
+# Secret Scan Workflow - TruffleHog credential leak detection.
+#  Runs verified-only secret scanning on pull requests, master pushes,
+#  and manual dispatch without adding local commit-hook friction.
+# -------------------------------------------------------------------
+######################################################################
+name: Secret Scan
+
+on:
+  pull_request:
+  push:
+    branches: ["master"]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  trufflehog:
+    name: TruffleHog
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Scan for verified secrets
+        uses: trufflesecurity/trufflehog@v3.95.3
+        with:
+          version: v3.95.3
+          extra_args: --results=verified --force-skip-binaries --force-skip-archives