Add workflow to check lines of code excluding tests

.agent/workflows/loc.md

@@ -0,0 +1,7 @@
+---
+description: Count lines of TypeScript source code excluding tests
+---
+
+// turbo-all
+1. Count TypeScript lines excluding tests: `(Get-ChildItem -Recurse -Include *.ts -Exclude *.test.ts,*.spec.ts -Path . | Where-Object { $_.FullName -notmatch '\\node_modules\\' } | Get-Content | 
+Measure-Object -Line).Lines`