feat: Enhance provider components with detailed documentation and comments

- Added comprehensive comments and JSDoc-style documentation to NotificationProvider, ThemeProvider, UserProvider, and WebsiteThemeProvider for better clarity and maintainability.
- Improved type definitions in index.ts for better code understanding and usage.
- Introduced Docker support with Dockerfiles for various services including AI server, signaling server, and browser-use service.
- Created a docker-compose.yml file to orchestrate multiple services including PostgreSQL, AI, scraper, and frontend.
- Added a startup guide (startup.txt) for setting up the CRM environment on Ubuntu with Docker.
- Included a .dockerignore file to exclude unnecessary files from Docker builds.

src/components/ui/button.tsx

@@ -1,3 +1,7 @@
+// ── UI: Button Primitive ──
+// Versatile button with variant (default, destructive, outline, secondary, ghost, link)
+// and size (default, sm, lg, icon) options via CVA.
+
 import * as React from "react"
 import { Slot } from "@radix-ui/react-slot"
 import { cva, type VariantProps } from "class-variance-authority"