Refactor marketing configuration and sidebar display

- Removed the IS_MARKETING flag from app-config.ts to simplify configuration.
- Updated the Sidebar component to always display the "AutoMaker" branding, removing conditional rendering based on the marketing flag.
- Cleaned up package.json by removing the dev:marketing script and ensuring consistency in test commands.
- Cleaned up package-lock.json by removing references to the marketing app and its dependencies.

apps/app/src/config/app-config.ts

@@ -1,6 +0,0 @@
-/**
- * Marketing mode flag
- * When set to true, displays "https://automaker.app" with "maker" in theme color
- */
-
-export const IS_MARKETING = process.env.NEXT_PUBLIC_IS_MARKETING === "true";