feat: add some useful skills

skills/planka-project/references/card-template.md

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+## Goal
+
+[One-sentence description of what this work enables or unblocks.]
+
+## Context
+
+[Brief explanation of the current state: what exists, what's missing, and why this work is needed. Include links to relevant repos, services, or docs.]
+
+## Requirements
+
+1. **[Requirement area]**: [Description of what must happen]
+2. **Approach options**:
+   - [Option A]: [Brief description, tradeoffs]
+   - [Option B]: [Brief description, tradeoffs]
+   - [Option C]: [Brief description, tradeoffs]
+3. **Scope**: [What to target first, and what to extend to later]
+4. **Safety**: [Guardrails, constraints, or deployment protections]
+
+## Considerations
+
+- [Infrastructure or permissions prerequisites]
+- [Long-term vs short-term tradeoff notes]
+- [Simplest starting point]
+- [Generalizability / reusability concerns]
+
+## Acceptance Criteria
+
+- [ ] [Primary end-to-end workflow works]
+- [ ] [Secondary/manual trigger path works]
+- [ ] [Failure recovery mechanism exists]
+- [ ] [Pattern is documented and reusable]
+