fix: rename all packages from @mosaic/* to @mosaicstack/*

- Updated all package.json name fields and dependency references
- Updated all TypeScript/JavaScript imports
- Updated .woodpecker/publish.yml filters and registry paths
- Updated tools/install.sh scope default
- Updated .npmrc registry paths (worktree + host)
- Enhanced update-checker.ts with checkForAllUpdates() multi-package support
- Updated CLI update command to show table of all packages
- Added KNOWN_PACKAGES, formatAllPackagesTable, getInstallAllCommand
- Marked checkForUpdate() with @deprecated JSDoc

Closes #391

packages/auth/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "@mosaic/auth",
+  "name": "@mosaicstack/auth",
   "version": "0.0.2",
   "repository": {
     "type": "git",
@@ -28,7 +28,7 @@
     "vitest": "^2.0.0"
   },
   "dependencies": {
-    "@mosaic/db": "workspace:^",
+    "@mosaicstack/db": "workspace:^",
     "better-auth": "^1.5.5"
   },
   "publishConfig": {