Add Mock Service Worker

[washingtonsoares]

Issue Description

Currently we don't have a mechanism to mock requests from the backend, moreover, we have a very bad way of mocking requests in unit tests.

Solution

Introducing Mock Service Worker

Mock Service Worker is an API mocking library that uses Service Worker API to intercept actual requests and works fine on both browser and node environment

See more at: https://mswjs.io/docs/

[codecov]

Codecov Report

Merging #962 (fb6a960) into main (1ed5140) will increase coverage by 0.04%.
The diff coverage is 91.66%.

@@             Coverage Diff              @@
##               main     #962      +/-   ##
============================================
+ Coverage     77.44%   77.48%   +0.04%     
  Complexity     1978     1978              
============================================
  Files          1181     1192      +11     
  Lines         16378    16390      +12     
  Branches       1489     1489              
============================================
+ Hits          12684    12700      +16     
+ Misses         3219     3217       -2     
+ Partials        475      473       -2     

Flag	Coverage Δ	Complexity Δ
ui	80.45% <91.66%> (+0.08%)	0.00 <0.00> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ	Complexity Δ
ui/src/mocks/browser.ts	0.00% <0.00%> (ø)	0.00 <0.00> (?)
ui/src/mocks/handlers.ts	100.00% <100.00%> (ø)	0.00 <0.00> (?)
ui/src/mocks/handlers/auth/index.ts	100.00% <100.00%> (ø)	0.00 <0.00> (?)
ui/src/mocks/handlers/auth/responses.ts	100.00% <100.00%> (ø)	0.00 <0.00> (?)
ui/src/mocks/handlers/circleMatcher/index.ts	100.00% <100.00%> (ø)	0.00 <0.00> (?)
ui/src/mocks/handlers/circleMatcher/responses.ts	100.00% <100.00%> (ø)	0.00 <0.00> (?)
ui/src/mocks/handlers/users/index.ts	100.00% <100.00%> (ø)	0.00 <0.00> (?)
ui/src/mocks/handlers/users/responses.ts	100.00% <100.00%> (ø)	0.00 <0.00> (?)
ui/src/mocks/handlers/workspaces/index.ts	100.00% <100.00%> (ø)	0.00 <0.00> (?)
ui/src/mocks/handlers/workspaces/responses.ts	100.00% <100.00%> (ø)	0.00 <0.00> (?)
... and 13 more

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[washingtonsoares]

Out of curiosity: This is an auto generated file