osu! subdivide nations door cavitedev

Display regional flags on the official osu! website.
Adds Score Ranking to the profiles.

Most flags come from wikimedia. Check their website for their attribution.

Regions data come from https://osuworld.octo.moe/
If you wish to have the regional flag on your profile shown you should log in there.

Suggestions and contact in Discord: https://discord.gg/s7TMSQt3E2