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

docs/reports/qa/gateway-security-20260313.md

@@ -18,7 +18,7 @@
 
 | Command | Result | Evidence |
 | --- | --- | --- |
-| `pnpm --filter @mosaic/gateway test -- src/chat/__tests__/chat-security.test.ts src/__tests__/resource-ownership.test.ts` | pass | 3 test files passed, 20 tests passed |
+| `pnpm --filter @mosaicstack/gateway test -- src/chat/__tests__/chat-security.test.ts src/__tests__/resource-ownership.test.ts` | pass | 3 test files passed, 20 tests passed |
 | `pnpm typecheck` | pass | turbo completed 18/18 package typecheck tasks |
 | `pnpm lint` | pass | turbo completed 18/18 package lint tasks |
 | `pnpm format:check` | pass | `All matched files use Prettier code style!` |