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/p8-001-sso-providers.md

@@ -50,16 +50,16 @@ Add WorkOS and Keycloak as optional SSO providers to the BetterAuth configuratio
 
 ## Quality Gate Results
 
-| Gate                | Status                                       |
-| ------------------- | -------------------------------------------- |
-| typecheck           | ✅ 32/32 cached green                        |
-| lint                | ✅ 18/18 cached green                        |
-| format:check        | ✅ All matched files use Prettier code style |
-| test (@mosaic/auth) | ✅ 8/8 tests passed                          |
+| Gate                     | Status                                       |
+| ------------------------ | -------------------------------------------- |
+| typecheck                | ✅ 32/32 cached green                        |
+| lint                     | ✅ 18/18 cached green                        |
+| format:check             | ✅ All matched files use Prettier code style |
+| test (@mosaicstack/auth) | ✅ 8/8 tests passed                          |
 
 ## Verification Evidence
 
 - `pnpm typecheck` — FULL TURBO, 32 tasks successful
 - `pnpm lint` — FULL TURBO, 18 tasks successful
 - `pnpm format:check` — All matched files use Prettier code style!
-- `pnpm --filter=@mosaic/auth test` — 8 tests passed, 0 failed
+- `pnpm --filter=@mosaicstack/auth test` — 8 tests passed, 0 failed