Add script for security only baseline (#1695)

scripts/security-baseline.ps1

@@ -0,0 +1,20 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+# Note:
+# This script generates a baselines that only includes rules that aligned to the security pillar.
+
+$rules = @((Get-PSRule -Module PSRule.Rules.Azure | Where-Object { $_.Info.Annotations['pillar'] -eq 'Security' }).Id.Value);
+$baseline = @(@{
+    apiVersion = 'github.com/microsoft/PSRule/v1'
+    kind = 'Baseline'
+    metadata = @{
+        name = 'SecurityBaseline'
+    }
+    spec = @{
+        rule = @{
+            include = @($rules)
+        }
+    }
+})
+ConvertTo-Json -Depth 100 -InputObject $baseline | Set-Content -Path .\Baseline.Rule.jsonc