fix: rename root package to avoid shadowing published CLI (#17)

`npx hyperframes init` failed with "could not determine executable to run"
because the monorepo root package.json shared the same name as the published
npm package. npx resolved the local root (which has no bin field) instead of
the published package. Renaming to "hyperframes-monorepo" follows the same
convention as remotion-monorepo.

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

package.json

@@ -1,5 +1,5 @@
 {
-  "name": "hyperframes",
+  "name": "hyperframes-monorepo",
   "private": true,
   "type": "module",
   "scripts": {