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/scratchpads/p5-004-authentik-sso.md

@@ -18,21 +18,21 @@
   4. Confirmed `packages/auth/src/index.ts` already exports `AuthConfig`; no change required there.
 
 - Verification:
-  1. `pnpm --filter @mosaic/db build`
-  2. `pnpm --filter @mosaic/auth typecheck`
-  3. `pnpm --filter @mosaic/gateway typecheck`
+  1. `pnpm --filter @mosaicstack/db build`
+  2. `pnpm --filter @mosaicstack/auth typecheck`
+  3. `pnpm --filter @mosaicstack/gateway typecheck`
   4. `pnpm lint`
   5. `pnpm format:check`
-  6. `pnpm --filter @mosaic/auth test`
-  7. `pnpm --filter @mosaic/gateway test`
+  6. `pnpm --filter @mosaicstack/auth test`
+  7. `pnpm --filter @mosaicstack/gateway test`
 
 - Results:
-  1. `@mosaic/auth` typecheck passed after replacing the non-existent `enabled` field with conditional plugin registration.
-  2. `@mosaic/gateway` typecheck passed.
+  1. `@mosaicstack/auth` typecheck passed after replacing the non-existent `enabled` field with conditional plugin registration.
+  2. `@mosaicstack/gateway` typecheck passed.
   3. Repo lint passed.
   4. Prettier check passed after formatting `apps/gateway/src/main.ts`.
-  5. `@mosaic/auth` tests reported `No test files found, exiting with code 0`.
-  6. `@mosaic/gateway` tests passed: `3` files, `20` tests.
+  5. `@mosaicstack/auth` tests reported `No test files found, exiting with code 0`.
+  6. `@mosaicstack/gateway` tests passed: `3` files, `20` tests.
 
 - Review:
   1. Manual review of the diff found no blocker issues.