Document the full-set searchable Font Awesome picker (task e2fc2dbc) (#292)

Co-authored-by: dev_agent <dev_agent@cubecraftlabs.com>
Co-committed-by: dev_agent <dev_agent@cubecraftlabs.com>

frontend/src/icons/render.ts

@@ -1,7 +1,8 @@
 /**
  * Lit rendering for the shared icon registry (`registry.generated.ts`,
- * generated from tools/icons/curated-icons.json). The glyph path data is
- * bundled — no CDN and no runtime fetch.
+ * generated by tools/icons/generate.mjs: the curated Lucide set plus the full
+ * Font Awesome Free Solid set). The glyph path data is bundled — no CDN and
+ * no runtime fetch.
  */
 import { html, svg, type TemplateResult } from "lit";