feat(keyboard): select all per {Control}+[KeyA]

[ph-fritsche]

What:

Select all per key combination.

Why:

Default behavior in the browser.

How:

Add a behaviorPlugin for keydown on {Control>}[KeyA].

Checklist:

• Documentation
• Tests
• Ready to be merged

Additional information
This requires proper handling of selection ranges.

user-event/src/utils/edit/selectionRange.ts

Line 15 in 3fa471f

// TODO: properly handle selection ranges

Renders our implementation of userEvent.keyboard('{selectall}') obsolete which allows to remove the only specialChar and behaviorPlugin that has no corresponding behavior in the browser.
Also allows us to replace the implementation of userEvent.clear().

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[codecov]

Codecov Report

Merging #774 (a598fee) into alpha (9273c8a) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##             alpha      #774   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           64        66    +2     
  Lines         1384      1394   +10     
  Branches       544       549    +5     
=========================================
+ Hits          1384      1394   +10     

Impacted Files	Coverage Δ
src/keyboard/plugins/index.ts	100.00% <ø> (ø)
src/keyboard/plugins/combination.ts	100.00% <100.00%> (ø)
src/utils/focus/selectAll.ts	100.00% <100.00%> (ø)

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[github-actions]

🎉 This PR is included in version 14.0.0-alpha.8 🎉

The release is available on:

• npm package (@alpha dist-tag)
• GitHub release

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[ph-fritsche]

See #778 (comment)
This behavior is triggered by Cmd+A on Mac. Maybe this should be made configurable like the keyboardMap in the future.