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

scratchpads/cli-tui-tools-enhancement.md

@@ -44,7 +44,7 @@ Add 5 capability areas to the Mosaic CLI/TUI + gateway agent:
 
 ### 5. Implement /stop
 
-- Add `abort` event to ClientToServerEvents in @mosaic/types
+- Add `abort` event to ClientToServerEvents in @mosaicstack/types
 - TUI sends abort event on /stop command
 - Gateway chat handler aborts the Pi session prompt
 - Update use-socket to support abort