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/src/auth.ts

@@ -2,7 +2,7 @@ import { betterAuth } from 'better-auth';
 import { drizzleAdapter } from 'better-auth/adapters/drizzle';
 import { admin } from 'better-auth/plugins';
 import { genericOAuth, type GenericOAuthConfig } from 'better-auth/plugins/generic-oauth';
-import type { Db } from '@mosaic/db';
+import type { Db } from '@mosaicstack/db';
 import { buildGenericOidcProviderConfigs } from './sso.js';
 
 export interface AuthConfig {