feat: add post-develop verification before label transition

[monkut]

Summary

• Add detection-based post-develop verification step that runs project test, lint, and type check commands before transitioning issue to action:review
• Detect commands from pyproject.toml (poe tasks or direct tools), package.json (npm scripts), or Makefile targets
• Skip verification gracefully when no commands are detected (don't block transition)

Verification

• uv run poe test — passed (114 tests)
• uv run poe check — passed (no issues)
• uv run poe typecheck — passed (0 errors)

Test plan

• Verification detects poe tasks from pyproject.toml
• Verification detects direct tools (pytest/ruff/pyright) from pyproject.toml
• Verification detects npm scripts from package.json
• Verification detects Makefile targets
• Empty project (no config) skips verification and allows transition
• All checks passing allows transition to review
• Any check failing blocks transition to review
• Command not found handled gracefully
• Command timeout handled gracefully
• Existing develop transition tests updated and passing

Closes #69

[monkut]

Addressed review feedback in 5bc05ed.

Replaced all hardcoded language/tool detection with user-configured verification commands.

Detection now reads from:

1. [tool.askcc.verify] in pyproject.toml
2. [[verify]] in .askcc.toml

Example config (any language/framework):

# pyproject.toml
[[tool.askcc.verify]]
name = "tests"
cmd = "uv run poe test"

[[tool.askcc.verify]]
name = "lint"
cmd = "uv run poe check"

Or for non-Python projects via .askcc.toml:

[[verify]]
name = "tests"
cmd = "npm test"

[[verify]]
name = "lint"
cmd = "npm run lint"

If no config is found, verification is skipped (no blocking). All hardcoded uv/pytest/ruff/npm/make detection removed.