Modernize Angular code by removing decorators

[HarelM]

@Input => input
@Output => output
@Viewchild => viewChild
@ViewChildren => viewChildren
Move inject code from constructor to inject method.
Fix relevant tests and code.

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.33%. Comparing base (80033ab) to head (b6b1b94).

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2035      +/-   ##
==========================================
- Coverage   91.33%   91.33%   -0.01%     
==========================================
  Files          93       93              
  Lines        8106     8103       -3     
  Branches      985      985              
==========================================
- Hits         7404     7401       -3     
  Misses        477      477              
  Partials      225      225              

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