edge cases for pip parsing

[JayGhiya]

Potential Edge Cases or Rare Scenarios

While we do have strong coverage, here are a few scenarios you might want to confirm or test for completeness:

Nested Requirements: If a requirements.txt references another file (e.g., “-r common.txt”) recursively. This is somewhat less common, but can occur in multi-file setups.

Editable Installs (-e . or -e <vcs_url>): If you want to track these as dependencies.

Markers that are more complex (e.g., platform_system == "Linux" or python_full_version).

Extra advanced features like optional sub-dependencies under a VCS reference.

Most people won’t need these, but if we run across them, we might add separate dedicated tests.

[huly-for-github]

Connected to Huly®: UNOPL-328