fix: update demo GIF showing full DAG output

docs: add VHS demo GIF and update README

docs: clarify positioning vs Polyscope, focus on DAG and CLI angle

docs: add CLAUDE.md, CONTRIBUTING.md and GitHub issue templates

docs: add CLAUDE.md, CONTRIBUTING.md and GitHub issue templates

fix: include idle branches with commits in hive pr --all

feat: add hive pr command to commit, push and create PRs from worktrees

feat: enhance hive status with agent detection, changes and last commit

feat: add Claude Code headless mode as default AI provider

fix: parse target project .env directly with Dotenv::parse and putenv

fix: load target project .env in register() and refresh prism config

fix: default AI provider to Anthropic, add additionalProperties constraint

fix: define full structured schema for DagAnalyzerAgent tasks array

fix: register PrismServiceProvider, add prism config, load target project .env

docs: add comprehensive README with usage, commands and architecture