Add ability to search task with tag or category

[sudhirverma]

Fix: #452

[codecov-commenter]

Codecov Report

Merging #624 (dc21759) into master (7e72bf7) will increase coverage by 0.06%.
The diff coverage is 38.46%.

@@            Coverage Diff             @@
##           master     #624      +/-   ##
==========================================
+ Coverage   68.00%   68.07%   +0.06%     
==========================================
  Files         103      103              
  Lines        6326     6333       +7     
  Branches     1135     1140       +5     
==========================================
+ Hits         4302     4311       +9     
+ Misses       2024     2022       -2     

Impacted Files	Coverage Δ
src/hub/hub-view.ts	25.83% <ø> (ø)
src/tekton-hub-client/api.ts	18.79% <14.28%> (+0.09%)	⬆️
src/hub/hub-client.ts	38.18% <66.66%> (+4.18%)	⬆️
src/cli.ts	85.24% <0.00%> (-1.64%)	⬇️
src/util/check-cluster-status.ts	68.49% <0.00%> (+6.84%)	⬆️

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