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/03_component-decomposition.md

@@ -0,0 +1,29 @@
+## Step 3: Component Decomposition
+
+**Role**: Professional software architect
+**Goal**: Decompose the architecture into components with detailed specs
+**Constraints**: No code; only names, interfaces, inputs/outputs. Follow SRP strictly.
+
+1. Identify components from the architecture; think about separation, reusability, and communication patterns
+2. Use blackbox test scenarios from Step 1 to validate component boundaries
+3. If additional components are needed (data preparation, shared helpers), create them
+4. For each component, write a spec using `templates/component-spec.md` as structure
+5. Generate diagrams:
+   - draw.io component diagram showing relations (minimize line intersections, group semantically coherent components, place external users near their components)
+   - Mermaid flowchart per main control flow
+6. Components can share and reuse common logic, same for multiple components. Hence for such occurences common-helpers folder is specified.
+
+**Self-verification**:
+- [ ] Each component has a single, clear responsibility
+- [ ] No functionality is spread across multiple components
+- [ ] All inter-component interfaces are defined (who calls whom, with what)
+- [ ] Component dependency graph has no circular dependencies
+- [ ] All components from architecture.md are accounted for
+- [ ] Every blackbox test scenario can be traced through component interactions
+
+**Save action**: Write:
+ - each component `components/[##]_[name]/description.md`
+ - common helper `common-helpers/[##]_helper_[name].md`
+ - diagrams `diagrams/`
+
+**BLOCKING**: Present component list with one-line summaries to user. Do NOT proceed until user confirms.