docs(work): scaffold frontend-conformance-v1 epic + story

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docs/work/frontend-conformance-v1/_epic.md

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+---
+id: frontend-conformance-v1
+prd: null
+title: Frontend conformance rules v1
+type: epic
+status: in-progress
+features: [core-eslint]
+created: 2026-05-13
+---
+
+## Goal
+Three structural ESLint rules for frontend component files: every
+component has a sibling Storybook story, a sibling test, and respects
+atomic-design tier direction (atoms can't import from organisms, etc.).
+
+## Why
+The frontend-work-shape guide describes these conventions; without
+rules, they're advisory only. Ship them now so they activate the moment
+core-ui or feature UI components land — preventing drift from day one.
+
+## Stories
+- [ ] [01 — Frontend ESLint rules](01-frontend-rules/_story.md)