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/templates/resilience-tests.md

@@ -0,0 +1,37 @@
+# Resilience Tests Template
+
+Save as `DOCUMENT_DIR/tests/resilience-tests.md`.
+
+---
+
+```markdown
+# Resilience Tests
+
+### NFT-RES-01: [Test Name]
+
+**Summary**: [What failure/recovery scenario this validates]
+**Traces to**: AC-[ID]
+
+**Preconditions**:
+- [System state before fault injection]
+
+**Fault injection**:
+- [What fault is introduced — process kill, network partition, invalid input sequence, etc.]
+
+**Steps**:
+
+| Step | Action | Expected Behavior |
+|------|--------|------------------|
+| 1 | [inject fault] | [system behavior during fault] |
+| 2 | [observe recovery] | [system behavior after recovery] |
+
+**Pass criteria**: [recovery time, data integrity, continued operation]
+```
+
+---
+
+## Guidance Notes
+
+- Resilience tests must define both the fault and the expected recovery — not just "system should recover."
+- Include specific recovery time expectations and data integrity checks.
+- Test both graceful degradation (partial failure) and full recovery scenarios.