chore: reorganize into polyglot monorepo (workshop)

- Move bigmind/ -> mcp/bigmind/
- Move webscraper/ -> mcp/webscraper/
- Move mss-failsafe/ -> java/mss-failsafe/
- Move Wellmann-Shop/ -> java/wellmann-shop/ (normalize to kebab-case)
- Add .roo/ IDE config files to tracking
- Add plans/REPO_STRATEGY.md (monorepo strategy document)
- Expand .gitignore: Java/Maven, Node/TS, coverage, uv.lock
- Rewrite README.md as navigation index
- Update .roo/mcp.json webscraper path to mcp/webscraper/

.roo/rules-orchestrator/00-orchestrator-behavior.md

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+# Orchestrator Mode Behavior — Roo Code
+
+## Before Breaking Down a Task
+1. **Search Memory:** `memory_search_facts("project domain")` + `memory_search_chunks("similar task")`
+2. **Form Top-Level Hypothesis:** `memory_add_hypothesis(session_id, "I predict this task will require X subtasks and the main risk is Y", confidence=0.7)`
+3. **Announce Focus:** `memory_announce_focus(session_id, "Orchestrating task: Z", files=["files to be touched"], ide_hint="VS Code")`
+
+## Orchestration Patterns
+- **One hypothesis per subtask:** Before delegating each subtask, form a specific hypothesis about what the subtask will find or produce
+- **Store decisions immediately:** After each subtask completes, call `memory_store_fact` with what was decided or built — don't batch at the end
+- **Token Efficiency:** Use `memory_log_token_save` when memory recall replaces reading files or running commands to gather context
+- **Conflict detection:** Before delegating work that touches files, call `memory_get_active_sessions()` to check for conflicts
+
+## Delegating Subtasks
+- Pass enough BigMind context to sub-modes so they don't repeat searches
+- Specify `session_id` and relevant stored facts in the delegation message
+- Each delegated mode must still call `memory_announce_focus` for the files it will touch
+
+## After Full Task Completion
+1. **Resolve All Hypotheses:** Call `memory_resolve_hypothesis` for every hypothesis opened during orchestration
+2. **Store Summary Fact:** `memory_store_fact("architecture-decision", "Implemented X by orchestrating Y+Z approach")` — capture the architectural choice
+3. **Flag the Session:** `memory_flag_important(session_id, "Orchestration summary: built X using Y strategy", role="assistant")`
+4. **Log Token Savings:** Sum up all efficiency gains across subtasks in `memory_log_token_save`