feat: update courses information

[amishshah]

Updates the client to work with the API changes implemented in unicsmcr/unics_social_api#135.

Currently blocked until that PR is merged.

[codecov]

Codecov Report

Merging #39 into main will decrease coverage by 0.83%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##             main      #39      +/-   ##
==========================================
- Coverage   58.90%   58.06%   -0.84%     
==========================================
  Files           5        6       +1     
  Lines         219      217       -2     
  Branches       35       27       -8     
==========================================
- Hits          129      126       -3     
- Misses         90       91       +1     

Impacted Files	Coverage Δ
src/types/api.ts	100.00% <ø> (ø)
src/types/gateway.ts	100.00% <ø> (ø)
src/types/courses/index.ts	80.00% <80.00%> (ø)
src/types/index.ts	100.00% <100.00%> (ø)

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