feat(chronos): added date parse logic

[valorkin]

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• read and followed the CONTRIBUTING.md guide.
• built and tested the changes locally.
• added/updated tests.
• added/updated API documentation.
• added/updated demos.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (development@321f9ae). Click here to learn what that means.
The diff coverage is 77.77%.

@@              Coverage Diff               @@
##             development    #3271   +/-   ##
==============================================
  Coverage               ?   72.47%           
==============================================
  Files                  ?      248           
  Lines                  ?     8052           
  Branches               ?     1527           
==============================================
  Hits                   ?     5836           
  Misses                 ?     1795           
  Partials               ?      421

Impacted Files	Coverage Δ
src/bs-moment/units/year.ts	100% <ø> (ø)
src/bs-moment/units/week-calendar-utils.ts	100% <ø> (ø)
src/datepicker/bs-datepicker-input.directive.ts	28.33% <ø> (ø)
src/datepicker/utils/bs-calendar-utils.ts	34.78% <ø> (ø)
src/datepicker/reducer/bs-datepicker.reducer.ts	12.09% <ø> (ø)
src/bs-moment/utils/abs-round.ts	100% <ø> (ø)
src/bs-moment/test/test-helpers.ts	100% <ø> (ø)
src/bs-moment/units/priorities.ts	100% <ø> (ø)
src/bs-moment/units/constants.ts	100% <ø> (ø)
src/bs-moment/utils/start-end-of.ts	100% <ø> (ø)
... and 82 more

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