refactor: rename packages to @paperclipai and CLI binary to paperclipai

Rename all workspace packages from @paperclip/* to @paperclipai/* and
the CLI binary from `paperclip` to `paperclipai` in preparation for
npm publishing. Bump CLI version to 0.1.0 and add package metadata
(description, keywords, license, repository, files). Update all
imports, documentation, user-facing messages, and tests accordingly.

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

packages/shared/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "@paperclip/shared",
+  "name": "@paperclipai/shared",
   "version": "0.0.1",
   "private": true,
   "type": "module",