ci(validation): add regex pattern validation

scripts/unitTest.ps1

@@ -0,0 +1 @@
+# TODO: Run a single unit test given a regular expression and unit test. A unit test includes the input string and whether it should match or not.

scripts/validatePattern.ps1

@@ -0,0 +1,73 @@
+param(
+    [Parameter(Mandatory=$true)]
+    [string]$YamlFilePath
+)
+
+$moduleName = "regex"
+
+function Write-Log {
+    param(
+        [Parameter(Mandatory=$true)]
+        [string]$Level,
+        [Parameter(Mandatory=$true)]
+        [string]$Message
+    )
+    
+    $timestamp = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
+    $levelPadded = $Level.ToUpper().PadRight(7)
+    $modulePadded = $moduleName.PadRight(0)
+    
+    # Write colored level
+    Write-Host -NoNewline "["
+    if ($Level -eq "ERROR") {
+        Write-Host -NoNewline $levelPadded -ForegroundColor Red
+    }
+    elseif ($Level -eq "SUCCESS") {
+        Write-Host -NoNewline $levelPadded -ForegroundColor Green
+    }
+    elseif ($Level -eq "INFO") {
+        Write-Host -NoNewline $levelPadded -ForegroundColor Cyan
+    }
+    else {
+        Write-Host -NoNewline $levelPadded
+    }
+    Write-Host -NoNewline "] "
+    
+    # Write grey timestamp
+    Write-Host -NoNewline "[$timestamp] " -ForegroundColor DarkGray
+    
+    # Write module and message in normal color
+    Write-Host "[$modulePadded] $Message"
+}
+
+try {
+    # Check if file exists
+    if (-not (Test-Path $YamlFilePath)) {
+        Write-Log -Level "ERROR" -Message "YAML file not found: $YamlFilePath"
+        exit 1
+    }
+
+    # Read YAML content
+    $yamlContent = Get-Content -Path $YamlFilePath -Raw
+
+    # Extract pattern field from YAML
+    $patternMatch = [regex]::Match($yamlContent, 'pattern:\s*(.+)')
+    $pattern = $patternMatch.Groups[1].Value.Trim()
+    
+    Write-Log -Level "INFO" -Message "Found pattern: $pattern"
+    
+    # Validate the pattern against .NET regex engine
+    try {
+        $regex = New-Object System.Text.RegularExpressions.Regex($pattern)
+        Write-Log -Level "SUCCESS" -Message "Valid regex pattern"
+        exit 0
+    }
+    catch {
+        Write-Log -Level "ERROR" -Message "Pattern validation failed: $_"
+        exit 1
+    }
+}
+catch {
+    Write-Log -Level "ERROR" -Message "Script execution failed: $_"
+    exit 1
+}