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/plan/steps/05_test-specifications.md

@@ -0,0 +1,20 @@
+## Step 5: Test Specifications
+
+**Role**: Professional Quality Assurance Engineer
+
+**Goal**: Write test specs for each component achieving minimum 75% acceptance criteria coverage
+
+**Constraints**: Test specs only — no test code. Each test must trace to an acceptance criterion.
+
+1. For each component, write tests using `templates/test-spec.md` as structure
+2. Cover all 4 types: integration, performance, security, acceptance
+3. Include test data management (setup, teardown, isolation)
+4. Verify traceability: every acceptance criterion from `acceptance_criteria.md` must be covered by at least one test
+
+**Self-verification**:
+- [ ] Every acceptance criterion has at least one test covering it
+- [ ] Test inputs are realistic and well-defined
+- [ ] Expected results are specific and measurable
+- [ ] No component is left without tests
+
+**Save action**: Write each `components/[##]_[name]/tests.md`