[#68 / 7] Command — Command, Item

[fedorovvvv]

Group 7 of 8 — sub-issue of #68 (PRD-018 / RFC-016).

Scope

Command palette primitives — bits-ui Command wrappers:

• Command — Command.{Root,Input,List,Empty,Group,Item,Separator}
• Item — alias / re-export of Command.Item with our chrome (also reusable as a generic list-item; if too narrow, leave only as part of Command).

Done when

• Each primitive has <Name>.svelte + index.ts barrel.
• shared/ui/index.ts re-exports both.
• npm run check passes.
• One commit on feature/issue-68-shadcn-components.

Parent: #68

[fedorovvvv]

Done in bd84649. npm run check clean.