feat: add pre-commit-schema-validation to backlog

.supercrew/features/pre-commit-schema-validation/design.md

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+---
+status: draft
+reviewers: []
+# approved_by: ""
+---
+
+# Pre-commit Schema Validation
+
+## Background
+
+Validate supercrew YAML/MD files against schemas in a pre-commit hook to ensure feature files conform to expected structure before commits.
+
+## Requirements
+
+<!-- To be refined during brainstorming -->
+
+## Design
+
+<!-- To be refined during brainstorming -->
+
+## Out of Scope
+
+<!-- To be defined -->

.supercrew/features/pre-commit-schema-validation/log.md

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+# Pre-commit Schema Validation — Progress Log
+
+## 2026-03-05 — Feature Created
+
+- Feature initialized with status: `planning`
+- Owner: Dazhen Pan
+- Priority: P1

.supercrew/features/pre-commit-schema-validation/meta.yaml

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+id: pre-commit-schema-validation
+title: "Pre-commit Schema Validation"
+status: planning
+owner: "Dazhen Pan"
+priority: P1
+teams: []
+tags: []
+created: "2026-03-05"
+updated: "2026-03-05"
+# target_release: ""
+# blocked_by: []

.supercrew/features/pre-commit-schema-validation/plan.md

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+---
+total_tasks: 0
+completed_tasks: 0
+progress: 0
+---
+
+# Pre-commit Schema Validation — Implementation Plan
+
+<!-- Task breakdown will be generated after design approval. -->
+<!-- Each task should be a checkbox item with clear acceptance criteria. -->
+
+## Tasks
+
+- [ ] Task 1: (to be defined)