fix: installer copies default framework files (AGENTS.md, STANDARDS.md) to mosaicHome

sourceDir now defaults to the bundled framework/ directory instead of
mosaicHome, so syncFramework() actually copies files. Additionally,
syncFramework() now copies root-level defaults (AGENTS.md, STANDARDS.md,
etc.) from framework/defaults/ into mosaicHome when they don't already
exist. Bump to 0.0.9.

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

packages/mosaic/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@mosaic/mosaic",
-  "version": "0.0.8",
+  "version": "0.0.9",
   "description": "Mosaic agent framework — installation wizard and meta package",
   "type": "module",
   "main": "dist/index.js",