Infrastructure: Create Python project structure and dependencies

[UncleTallest]

Goal: Set up proper Python project with dependency management.

Tasks:

• Create pyproject.toml with project metadata
• Define dependencies (PyGObject, requests, etc.)
• Set up basic package structure (src/claude_devel_client/)
• Configure linting (pylint, black, etc.)
• Create development setup script

Dependencies:

• Python 3.11+
• GTK4 / PyGObject
• Anthropic API client (or requests)

Success criteria:

• Project can be installed with pip install -e .
• Dependencies install cleanly
• Basic package imports work

Output: Project scaffolding in root directory