Setup codegen metaprogram skeleton

Going use it to swap macro implementation usage in the compiler.

scripts/helpers/target_arch.psm1

@@ -0,0 +1,25 @@
+# target_arch.psm1
+
+function Get-TargetArchClang {
+    # Get the target architecture by querying clang itself
+    $output = & clang -v 2>&1
+    foreach ($line in $output) {
+        if ($line -like "*Target:*") {
+            $clangTarget = ($line -split ':')[1].Trim()
+            return $clangTarget
+        }
+    }
+    throw "Clang target architecture could not be determined."
+}
+
+function Get-TargetArchMSVC {
+    # Assuming you've set the Visual Studio environment variables using `vcvarsall.bat`
+    # This looks for the `VSCMD_ARG_TGT_ARCH` environment variable which Visual Studio sets to indicate the target architecture.
+    $arch = $env:VSCMD_ARG_TGT_ARCH
+    if (-not $arch) {
+        throw "MSVC target architecture could not be determined. Ensure you've initialized the Visual Studio environment."
+    }
+    return $arch
+}
+
+Export-ModuleMember -Function Get-TargetArchClang, Get-TargetArchMSVC