docs(product): commit design references under docs/product/reference/

Copy the founder's design handoff bundle (.proto/design/) into
docs/product/reference/ byte-for-byte so dispatch agents running in git
worktrees can read the HTML prototypes, veect-codebase/ prototype,
upload PNGs, and remaining bundle files (ADR-029: reference only, never
vendored into packages/). Ignore-list entries so whole-codebase auditors
and formatters skip reference material: .prettierignore (byte
preservation through lint-staged), .fallowrc.json ignorePatterns, root
ESLint ignores, and the coverage:diff allowlist in
scripts/coverage/diff.mjs (+ unit test). .DS_Store files skipped.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016j8z4VHjedXDTjEDNg7qHK

.fallowrc.json

@@ -9,7 +9,8 @@
     "**/__snapshots__/**",
     "**/turbo/generators/templates/**",
     "**/*.generated.ts",
-    "**/*.d.ts"
+    "**/*.d.ts",
+    "docs/product/reference/**"
   ],
   "dynamicallyLoaded": [
     "packages/**/__factories__/**",