test(cloudron): add Git URL test file

- Add CloudronStack/test-git-urls.txt for testing Git URL functionality
- Include various test cases for Git URL validation and processing
- Enable better testing of CloudronStack Git operations

This adds important test infrastructure for CloudronStack operations.

CloudronStack/test-git-urls.txt

@@ -0,0 +1,3 @@
+https://github.com/target/goalert
+https://github.com/tirrenotechnologies/tirreno
+https://github.com/runmedev/runme