ReBTRoblox - Continuing the BTRoblox legacy av nrmu

ReBTRoblox enhances the Roblox website: a 3D item previewer, an asset explorer
and downloader, a paged server list, avatar tools, Robux to currency conversion,
and a long list of layout and quality of life changes across the site.

This is a continuation of BTRoblox by
AntiBoomz, who wrote the original and everything this is built on. That project
has not been actively maintained for some time, and as Roblox changed its site a
number of its features stopped working. This fork picks it up, repairs what
broke, and keeps it current. All credit for the original work is theirs.

Fixed in this fork

• Accessory and layered clothing limit bypass, which Roblox's new category caps had broken
• Asset explorer and download button on avatar item pages
• Downloads now use the item's real name instead of an asset id
• Robux to currency rates refreshed, with a separate DevEx rate
• Higher Robux precision, which had silently stopped applying
• Compact chat, after Roblox replaced the chat widget
• Profile pages no longer redirect into the inventory tab on their own
• Asset explorer now follows the site's light and dark themes

Also new

• Settings redesigned to match Roblox's own interface, with most options applying instantly instead of needing a reload
• Settings storage rewritten so preferences save reliably
• Refreshed API data and class icons
• Rewritten in TypeScript, which is what made the rest of this practical

Source code and release notes:
github.com/nrmu9/ReBTRoblox