fix(datepicker): start from date typed in input

[yggg]

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• I read and followed the CONTRIBUTING.md guide.
• I read and followed the New Feature Checklist guide.

Short description of what this resolves:

Fixes #1081 (not initial issue but comment)

[nnixaa]

Couple of tests?

[yggg]

Couple of tests?

@nnixaa ce3c032

[codecov]

Codecov Report

Merging #1300 into master will increase coverage by 0.61%.
The diff coverage is 90.32%.

@@            Coverage Diff             @@
##           master    #1300      +/-   ##
==========================================
+ Coverage   79.98%   80.59%   +0.61%     
==========================================
  Files         232      232              
  Lines        7033     7051      +18     
  Branches      590      592       +2     
==========================================
+ Hits         5625     5683      +58     
+ Misses       1241     1192      -49     
- Partials      167      176       +9

Impacted Files	Coverage Δ
...ndar-year-picker/calendar-year-picker.component.ts	94.44% <100%> (+0.15%)	⬆️
.../theme/components/calendar-kit/components/index.ts	100% <100%> (ø)	⬆️
...heme/components/datepicker/datepicker.component.ts	89.83% <100%> (+5.9%)	⬆️
...eme/components/calendar/base-calendar.component.ts	75.55% <50%> (ø)	⬆️
...ar-month-picker/calendar-month-picker.component.ts	75.75% <50%> (+1.56%)	⬆️
...heme/components/datepicker/datepicker.directive.ts	80.32% <0%> (+0.81%)	⬆️
...lendar-day-picker/calendar-day-picker.component.ts	100% <0%> (+7.14%)	⬆️
.../theme/components/calendar/calendar-range-cells.ts	75% <0%> (+16.17%)	⬆️
...me/components/calendar/calendar-range.component.ts	87.5% <0%> (+35.41%)	⬆️