chore: import .claude command skills, CLAUDE.md, .gitignore, next_steps.md

- Vendor local .claude/ command skills (autopilot, plan, implement, etc.)
- Add CLAUDE.md pointing slash commands to .claude/commands/*/SKILL.md
- Untrack docs-Lokal/ and ignore .planning/ for local-only planning docs
- Include next_steps.md pulled from upstream

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.claude/commands/research/templates/solution_draft_mode_b.md

@@ -0,0 +1,40 @@
+# Solution Draft
+
+## Assessment Findings
+
+| Old Component Solution | Weak Point (functional/security/performance) | New Solution |
+|------------------------|----------------------------------------------|-------------|
+| [old] | [weak point] | [new] |
+
+## Product Solution Description
+[Short description. Brief component interaction diagram. Written as if from scratch — no "updated" markers.]
+
+## Architecture
+
+[Architecture solution that meets restrictions and acceptance criteria.]
+
+### Component: [Component Name]
+
+| Solution | Tools | Advantages | Limitations | Requirements | Security | Performance | Fit |
+|----------|-------|-----------|-------------|-------------|----------|------------|-----|
+| [Option 1] | [lib/platform] | [pros] | [cons] | [reqs] | [security] | [perf] | [fit assessment] |
+| [Option 2] | [lib/platform] | [pros] | [cons] | [reqs] | [security] | [perf] | [fit assessment] |
+
+[Repeat per component]
+
+## Testing Strategy
+
+### Integration / Functional Tests
+- [Test 1]
+- [Test 2]
+
+### Non-Functional Tests
+- [Performance test 1]
+- [Security test 1]
+
+## References
+[All cited source links]
+
+## Related Artifacts
+- Tech stack evaluation: `_docs/01_solution/tech_stack.md` (if Phase 3 was executed)
+- Security analysis: `_docs/01_solution/security_analysis.md` (if Phase 4 was executed)