chore: Add repository details [description, website, tags]

[GabuTheDev]

This is a suggestion to add some repo details for better discoverability, such as a description, the website and tags.
I'm not sure about the tags, I feel like I'm being pretty vague about what this project is about, but have no other better ideas.

Osekai INEX — the next level of Osekai. Discover a sleeker interface, boosted performance, and exciting new features!
_{Inspired by this discord post}

preview of proposal

_{This repo's readme could also be updated to slightly match it with the main repo, and some info from the official post}