Add rtk python3 command with module routing and traceback filtering

[seungwoo-ji-03]

Summary

• python3 was detected 75 times as unsupported in rtk discover --all
• Add rtk python3 / rtk python commands that:
  • Route -m <module> to existing filters (pytest, mypy, ruff, pip)
  • Handle -m py_compile with compact ok ✓ output
  • Filter deep tracebacks to last frame + error line (60%+ savings)
• Extend discover rules: python3 -m pytest/pip/ruff correctly classified to specific rtk commands

Before / After

Command	Before	After
rtk python3 -m pytest tests/	unsupported	delegates to rtk pytest
rtk python3 -m pip list	unsupported	delegates to rtk pip
rtk python3 script.py (crash)	unsupported	traceback filtered (60%+ savings)
python3 -m ruff check . (discover)	unclassified	classified as rtk ruff (80%)

Test plan

• 16 new unit tests, 725 total passed
• cargo fmt + cargo clippy clean
• Token savings ≥60% verified on deep traceback fixture

Fixes #285

[seungwoo-ji-03]

@pszymkowiak Could you take a look when you get a chance? This addresses #285 by adding python3/python command routing and traceback filtering. Happy to walk through any part of the implementation.

[CLAassistant]

All committers have signed the CLA.

[aeppling]

Hey

We are cleaning up the codebase and improving the project structure for better onboarding. As part of this effort, PR #826 reorganizes src/ from a flat layout into subfolders.

No logic changes — only file moves and import path updates.

What you need to do

Rebase your branch on develop when receiving this comment:

git fetch origin && git rebase origin/develop

Git detects renames automatically. If you get import conflicts, update the paths:

use crate::git;        // now: use crate::cmds::git::git;
use crate::tracking;   // now: use crate::core::tracking;
use crate::config;     // now: use crate::core::config;
use crate::init;       // now: use crate::hooks::init;
use crate::gain;       // now: use crate::analytics::gain;

Need help rebasing? Tag @aeppling

[seungwoo-ji-03]

@aeppling Rebased on develop. All tests passing.