test: Add comprehensive edge case and error handling tests

fix: Improve GitHub Markdown compatibility for tree format examples

feat: Add tree format support with enhanced UX

feat: Add flake8 linting for Python code

feat: Add Streamable HTTP server option

docs: link to conductor-rules.md in README

feat: Actionable next-step suggestions in tool responses

docs: Add "Usage Rules for AI-Assisted Coding Editors" to README

docs: Add Conductor MCP Tool Usage Rules

fix: Make run.sh executable

refactor: Rename prerequisites to steps, improve API consistency

feat: Add cross-platform startup scripts

chore: Set up Black and pre-commit, reformat code to 88 line width

feat: Add `set_goals` tool for batch goal creation

feat(plan_goal): add Mermaid diagram output