v2: Use speedups

[greeeen-dev]

Checklist

• [X] The same feedback was not posted yet.
• [X] This is not a suggestion for the moderation team.
• [X] All info applicable to the issue has been attached.

Is your feature request related to a problem? Please describe.

Currently, Unifier v2 uses Nextcord/aiohttp without speedups as well as the standard json module.

Describe the solution you'd like

Install Nextcord with speedup dependencies as well as use orjson instead of json. Although data saving is threaded so UX won't be affected, it would still be a good idea for improving performance.

Describe alternatives you've considered

Additional context

[greeeen-dev]

Went with ujson instead, since orjson doesn't have load from file. Sadge