refactor: replace PowerShell regex testing with parser service integration

src/lib/server/regex/test.ps1

@@ -1,47 +0,0 @@
-# Test regex pattern against test strings using .NET regex engine
-# Usage: pwsh test.ps1 -Pattern "regex" -TestsJson '[{"testString":"test","criteria":"DOES_MATCH"}]'
-
-param(
-    [Parameter(Mandatory=$true)]
-    [string]$Pattern,
-
-    [Parameter(Mandatory=$true)]
-    [string]$TestsJson
-)
-
-try {
-    $tests = $TestsJson | ConvertFrom-Json
-    $results = @()
-
-    foreach ($test in $tests) {
-        try {
-            $matched = [regex]::IsMatch(
-                $test.testString,
-                $Pattern,
-                [System.Text.RegularExpressions.RegexOptions]::IgnoreCase
-            )
-
-            $expectedMatch = $test.criteria -eq "DOES_MATCH"
-            $passed = $matched -eq $expectedMatch
-
-            $results += @{
-                testString = $test.testString
-                expected = $test.criteria
-                actual = $matched
-                passed = $passed
-            }
-        } catch {
-            $results += @{
-                testString = $test.testString
-                expected = $test.criteria
-                actual = $false
-                passed = $false
-                error = $_.Exception.Message
-            }
-        }
-    }
-
-    @{ success = $true; results = $results } | ConvertTo-Json -Depth 3 -Compress
-} catch {
-    @{ success = $false; error = $_.Exception.Message } | ConvertTo-Json -Compress
-}