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/

mcp/bigmind/run.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+BASEDIR=$(dirname "$0")
+cd "$BASEDIR" || exit
+# Lately path is not considering homebrew install, so we add it manually
+export PATH=%PATH:"$HOME"/.local/bin/:/Library/Frameworks/Python.framework/Versions/3.12/bin/
+uv run src/server.py