FAB Replacement on container knowledge, entities, and observables tabs

[Bonsai8863]

Proposed changes

• Replaced FAB in Containers > Knowledge > Add Drawer
• Replaced FAB in Containers > Entities
• Replaced FAB in Containers > Observables

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case (coverage and e2e)
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.72%. Comparing base (4c020e0) to head (49d870c).
Report is 4 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #7274   +/-   ##
=======================================
  Coverage   67.72%   67.72%           
=======================================
  Files         561      561           
  Lines       68985    68985           
  Branches     5875     5875           
=======================================
  Hits        46718    46718           
  Misses      22267    22267           

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