Added sample unit test cases

[shreyakhajanchi]

Added sample unit test for add-index and workspace components.

[codecov]

Codecov Report

Merging #694 (f90ec20) into master (3312b6a) will increase coverage by 0.97%.
Report is 1 commits behind head on master.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #694      +/-   ##
==========================================
+ Coverage   46.33%   47.31%   +0.97%     
==========================================
  Files         120      120              
  Lines       16643    16641       -2     
  Branches      473      471       -2     
==========================================
+ Hits         7712     7874     +162     
+ Misses       8443     8273     -170     
- Partials      488      494       +6     

Components	Coverage Δ
backend-apis	43.28% <ø> (ø)
backend-library	55.53% <ø> (ø)
cli	0.00% <ø> (ø)
frontend	31.96% <100.00%> (+4.66%)	⬆️

Files	Coverage Δ
...rc/app/components/workspace/workspace.component.ts	82.12% <100.00%> (+57.26%)	⬆️

... and 5 files with indirect coverage changes

[manitgupta]

Unit tests should be run by Github actions automatically. Add to test-coverage.yaml which currently runs the backend unit tests