fix: fwScript prefers npm-bundled scripts over stale deployed copies

fwScript() now resolves framework scripts from the @mosaic/mosaic npm
package first, falling back to ~/.config/mosaic/ only if the bundled
copy isn't found. This means `npm i -g @mosaic/cli@latest` immediately
takes effect without needing `mosaic init` to re-deploy scripts.

Bump @mosaic/mosaic and @mosaic/cli to 0.0.7.

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

packages/mosaic/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@mosaic/mosaic",
-  "version": "0.0.6",
+  "version": "0.0.7",
   "description": "Mosaic agent framework — installation wizard and meta package",
   "type": "module",
   "main": "dist/index.js",