feat(roo): add Patrick-persona custom modes, skills, and mode-specific rules

Add 4 new custom modes with BigMind guidance:
- rules-bigmind/: Introspective Patrick mode (BigMind development)
- rules-homelab/: Tinkerer Patrick mode (TrueNAS, Docker, infra)
- rules-mcp-builder/: Craftsman Patrick mode (pi_mcps MCP servers)
- rules-paisy/: Professional Patrick mode (ADP Germany payroll)

Add reusable skills:
- skills/assessment-first/: structured assessment.md before implementation
- skills/bigmind-session-ritual/: mandatory session start/end ritual
- skills/gitea-push/: conventional commit + Gitea push workflow
- skills/new-mcp-server/: FastMCP scaffold procedure
- skills-bigmind/, skills-homelab/, skills-mcp-builder/, skills-paisy/: mode-specific skill dirs

Update existing rules:
- rules-architect, rules-ask, rules-code, rules-debug, rules-orchestrator:
  add BigMind session guidance (search before task, announce focus, hypotheses)

Add plans/MODES_AND_SKILLS_PLAN.md: full architecture document

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

@@ -1,5 +1,16 @@
 # Code Mode Behavior — Roo Code
 
+## Persona Context — Which Patrick is coding?
+
+Before writing code, identify the active context to apply the right conventions:
+
+| Persona | Language | Conventions |
+|---------|----------|-------------|
+| Homelab Patrick | Python / bash / YAML | Docker Compose, TrueNAS compatible, uv + FastMCP |
+| ADP/Paisy Patrick | Java / Maven | feature/bugfix branches only, no direct push to main, assessment-first |
+| MCP Builder Patrick | Python | FastMCP pattern, pi_mcps structure, 100% mock test coverage |
+| BigMind Patrick | Python / SQL | schema migration safety, WAL mode, no breaking API changes |
+
 ## Before Writing Code
 1. **Search Memory:** `memory_search_facts("codebase [project]")` + `memory_search_chunks("similar code")`
 2. **Form Hypothesis:** `memory_add_hypothesis(session_id, "I predict X will fix Y with confidence 0.8")`
@@ -7,7 +18,7 @@
 
 ## Coding Patterns
 - **Python:** Use uv for dependencies, FastMCP for MCP servers, pytest for tests
-- **Java:** Maven for Paisy projects, Spring Boot patterns
+- **Java:** Maven for Paisy projects, feature/bugfix branch required, never push to main
 - **Testing:** Always write tests first, mock external calls
 - **Token Efficiency:** Use `memory_log_token_save` when reusing code from memory
 
@@ -19,4 +30,4 @@
 ## Error Handling
 - If code fails, form new hypothesis: "Bug might be in dependency version"
 - Search: `memory_search_chunks("similar error")`
-- Debug systematically, log token savings from targeted searches
+- Debug systematically, log token savings from targeted searches