Add default rules config

config/default_rules.yaml

@@ -0,0 +1,20 @@
+version: "1.0"
+rules:
+  - id: DANGER001
+    name: Dangerous rm -rf with variable
+    pattern: rm\s+-rf?\s+\$\w+
+    severity: critical
+    message: Dangerous deletion with variable
+    suggestion: Use absolute paths
+  - id: SECURITY001
+    name: Unquoted variable
+    pattern: (?<!["'])(\$[a-zA-Z_][a-zA-Z0-9_]*)(?!["'])
+    severity: high
+    message: Unquoted variable
+    suggestion: Quote variables
+  - id: BEST001
+    name: Missing set -e
+    pattern: ^[^#!]*set\s+-e
+    severity: medium
+    message: Missing set -e
+    suggestion: Add set -e