Implement Loading State

[mantism]

May be addressed by migrating away from NotionDB for rankings-fetcher (private repo) but loading the rankings table is not scaling well as more events get added.

Possible Solutions:

• (High Effort) Move completely away from Astro to allow for client-side rendering of the app
• (Medium Effort) Convert all Rankings/data-fetching related components into React components and use client:load directive within the parent Astro component
• (Out of scope) Wait for backend improvements to see if it fixes load time