feat(new-project): functional scaffold from Cortex template

[NickStr11]

This PR makes the /new-project command functional by introducing a Python-based scaffolding tool.

Key changes:

1. New Scaffolding Tool: Created tools/scaffold/main.py which handles:
   • Copying the Cortex project structure (hooks, workflows, commands, tools).
   • Excluding .git, .venv, node_modules, __pycache__, and other artifacts.
   • Replacing PROJECT_CONTEXT.md, DEV_CONTEXT.md, and README.md with clean templates.
   • Initializing a new Git repository and making the first commit.
2. Updated Command: Modified .claude/commands/new-project.md to be an interactive prompt that gathers project details (name, description, stack, path) and invokes the scaffolding tool.
3. Cleanup: Ensured that the scaffolding tool itself is not copied into the new project and that any transient files (logs, etc.) are ignored.
4. Verification: Verified the tool by creating a test project and ensuring all requirements are met.
5. Quality: Followed project rules (type hints, beartype, uv) and verified with pyright and existing tests.

Fixes #32

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PR created automatically by Jules for task 17347837608301422730 started by @NickStr11

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