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

apps/gateway/src/agent/agent.service.ts

@@ -7,8 +7,8 @@ import {
   type AgentSessionEvent,
   type ToolDefinition,
 } from '@mariozechner/pi-coding-agent';
-import type { Brain } from '@mosaic/brain';
-import type { Memory } from '@mosaic/memory';
+import type { Brain } from '@mosaicstack/brain';
+import type { Memory } from '@mosaicstack/memory';
 import { BRAIN } from '../brain/brain.tokens.js';
 import { MEMORY } from '../memory/memory.tokens.js';
 import { EmbeddingService } from '../memory/embedding.service.js';