integrate /api/search endpoint, get sources post stream

[ManishMadan2882]

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
  Streaming sources in the message stream is often missed
• Why was this change needed? (You can also link to an open issue here)
  Integrated new endpoint /api/search in the Client side which response with the array of sources

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6a70e3e) 19.11% compared to head (f4f0564) 19.11%.

Additional details and impacted files

@@                   Coverage Diff                    @@
##           feature/search-endpoint     #831   +/-   ##
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  Coverage                    19.11%   19.11%           
========================================================
  Files                           65       65           
  Lines                         3013     3013           
========================================================
  Hits                           576      576           
  Misses                        2437     2437           

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