feat: add multi-level demo format transform and fix tests

- Add scripts/transform_demo_format.py: transforms rigid {Observation,
  Intent, Action, Result} demos into adaptive {Think, Action, Expect}
  format with PLAN section (Option D from eval analysis)
  - LLM-assisted mode (default): uses vlm_call() for semantic transform
  - Rule-based mode (--no-llm): free, no API calls needed
  - Supports --dry-run for preview

- Fix tests for repr() escaping and coordinate clamping:
  - Remove TestEscapeForPyautogui (tests deleted function)
  - Update TestBuildTypeCommands for repr() output format
  - Add test_all_special_chars_produce_valid_python invariant test
  - Fix drag test to use snake_case field names
  - Fix coordinate edge test to expect clamped (0.005, 0.005)

- Regenerate uv.lock for consilium package name resolution

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: abrichr