Implement PipInstaller

[LittleCoinCoin]

Description:
Implement Python package installer using pip with virtual environment support.

Acceptance Criteria:

• PipInstaller class fully implemented with virtual environment isolation per Hatch environment
• requirements.txt generation, caching, and incremental updates Python deps are declared in the metadata of the hatch package, and the caching or incremental updates are managed by pip itself
• Version conflict resolution with clear error reporting for irresolvable conflicts Resolved by pip
• Extras installation support for optional dependencies Cancelled, irrelevant at this point
• Security scanning integration using pip-audit before installation #15
• Tests for python deps installation in correct environments #14

Dependencies:

• Requires Issue Abstract Dependency Installer Architecture #7