Set up AI dev environment for recordingtest (#2)

- CLAUDE.md with collaboration rules and Planner/Generator/Evaluator cycle
- .claude/ agents, commands, skills, hooks per Claude Code conventions
- Sprint Contracts for sut-prober, normalizer, recorder, player, diff-reporter
- SUT catalog (EG-BIM Modeler, 187 plugins) and .gitignore excluding SUT tree
- PROGRESS.md / PLAN.md as shared agent handoff state
- Solution scaffold targeting sut-prober PoC

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,18 @@
+# SUT 바이너리 트리 — recordingtest 저장소에는 포함하지 않음.
+# 로컬 테스트용으로만 동봉하며, 각 개발자가 별도로 배치한다.
+EG-BIM Modeler/
+
+# Build outputs
+bin/
+obj/
+*.user
+*.suo
+.vs/
+
+# Logs & temp
+*.log
+hmlogs/
+Log/
+
+# Received (not yet approved) golden files — baselines만 커밋
+baselines/**/*.received.*