refactor: move runtime scaffold from .claude/woterclip/ to .woterclip/

refactor: split CEO into Orchestrator + strategic CEO persona

fix: plugin validation + add marketplace.json for /plugin install

docs: fix install instructions to use --plugin-dir

style: use en dashes instead of em dashes in README

docs: expand README with heartbeat loop, prereqs, labels, migration

chore: add CLAUDE.md project guide and .gitignore

feat: scaffold WoterClip plugin (phases 1-8)