support more date formats and custom date parsers

[aciccarello]

Type: bug

The following has been addressed in the PR:

• [x] There is a related issue
• [x] All code matches the style guide
• [x] Unit tests are included in the PR
• [ ] For new widgets, an entry has been added to the .dojorc
• [ ] For new widgets, theme.variant() is added to the root domnode
• [ ] Any widget variant uses theme.compose like this
• [ ] WidgetProperties are exported

Description: Adds support for more date formats and the ability to pass a custom date parser. This resolves an issue with the date handling outside of a few select locales and adds support for several common date formats (as defined by Intl.DateTimeFormat().format()). For other locales or for more flexible date parsing (such as to support multiple formats at once), a custom date formatter/parser combo can be passed.

For locales where Intl.DateTimeFormat().format() produces something that is not supported, selecting a date from the calendar was resulting in an invalid date warning. This was because the Date value is formatted as a string using DateTimeFormat and later parsed. The fix was adding a check to the date-to-string formatter that avoids outputting un-parseable strings and defaults to ISO strings.

Resolves #1563

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widget-test-docs – ./

🔍 Inspect: https://vercel.com/dojo/widget-test-docs/DaDub1MQky9X6dTgze4pNSpJdn6k
✅ Preview: https://widget-test-do-git-fork-aciccarello-1563-intl-date-inpu-c7c5af.vercel.app

dojo.widgets – ./

🔍 Inspect: https://vercel.com/dojo/dojo.widgets/8viT7V7R7e9UZYfdAeNzH572a7Ja
✅ Preview: https://dojowidgets-git-fork-aciccarello-1563-intl-date-input-dojo1.vercel.app

[codecov[bot]]

Codecov Report

Merging #1712 (fd480a6) into master (8bade73) will decrease coverage by 0.00%. The diff coverage is 96.55%.

@@            Coverage Diff             @@
##           master    #1712      +/-   ##
==========================================
- Coverage   90.05%   90.05%   -0.01%     
==========================================
  Files          94       94              
  Lines        5050     5077      +27     
  Branches     1373     1384      +11     
==========================================
+ Hits         4548     4572      +24     
- Misses        249      251       +2     
- Partials      253      254       +1     

Impacted Files	Coverage Δ
src/date-input/date-utils.tsx	97.36% <94.11%> (-2.64%)	:arrow_down:
src/date-input/index.tsx	91.37% <100.00%> (+0.30%)	:arrow_up:
src/loading-indicator/index.tsx	88.46% <0.00%> (-11.54%)	:arrow_down:
src/text-input/index.tsx	92.68% <0.00%> (-0.24%)	:arrow_down:
src/time-picker/index.tsx	81.81% <0.00%> (ø)
src/password-input/index.tsx	78.57% <0.00%> (ø)
src/chip-typeahead/index.tsx	89.71% <0.00%> (+0.09%)	:arrow_up:
src/select/index.tsx	86.95% <0.00%> (+0.86%)	:arrow_up:

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