docs/readme.md: Add links to main KolibriOS website (Fix #201) (#396)

Adds prominent links to https://kolibrios.org in documentation:
- README.md: New 'Website' section with information about official site

These links help users find downloads, documentation, and more project information.

---------

Co-authored-by: nitinsoni4115 <nitinsoni4115@gmail.com>
Reviewed-on: KolibriOS/kolibrios#396
Reviewed-by: Burer <burer@kolibrios.org>
Reviewed-by: Mikhail Frolov <mixa.frolov2003@gmail.com>
Co-authored-by: nitinsoni4115 <nitinsoni2704@gmail.com>
Co-committed-by: nitinsoni4115 <nitinsoni2704@gmail.com>

README.md

@@ -9,6 +9,10 @@ Its kernel, most drivers, and many programs are written entirely in [FASM](https
 
 Based on [MenuetOS](https://www.menuetos.net/), it uses its own standards and is NOT fully POSIX or UNIX compliant.
 
+## Website
+
+Visit the [official KolibriOS website](https://kolibrios.org) for more information, downloads, and documentation.
+
 ## Contributing
 
 We would appreciate any participation in the project and always welcome new users and contributors.