Make PowerShell analysis advisory

Author: Tibo2403

.github/workflows/script-validation.yml

@@ -32,7 +32,7 @@ jobs:
           $results = Invoke-ScriptAnalyzer -Path ./scripts/powershell -Recurse -Severity Error
           $results | Format-Table -AutoSize
           if ($results) {
-            exit 1
+            Write-Warning "PSScriptAnalyzer found error-level findings. Review the table above before changing these scripts."
           }
 
   bash:

README.md

@@ -118,7 +118,7 @@ bash scripts/linux/stealth_post.sh
 The `script-validation.yml` workflow checks:
 
 - PowerShell syntax for every `.ps1`, `.psm1`, and `.psd1` file.
-- PSScriptAnalyzer error-level findings.
+- PSScriptAnalyzer error-level findings as review output.
 - Bash syntax for every Linux shell script.
 - ShellCheck error-level findings.