Robust Caching with SWR

[jacobrobertsbaca]

Robust Caching with SWR

Closes #27

• Strip away manual caching code inside api-context.ts and re-implement all API caching using the SWR library inside use-api.ts
• This version is functionally the same as the prior approach, but fixes some bugs involving cache correctness
  • This version uses more network bandwidth than before, but it is negligible and the improvement to code quality is almost definitely worth it
• Improved loading screens on pages (keep page title, show loading underneath)
  • More graceful error handling (show user the error and toast if one occurs)