feat(VMenu): add jump to first/last item keyboard navigation

[janKollars]

pressing HOME in a v-menu selects the first selectable list item, END the last

Description

I am not aware of any related open issues.

Motivation and Context

VSelect uses the VMenu component. On long lists it is convenient to use HOME/END to navigate to the top/bottom. This is an optional behaviour according to the W3C and is implemented in their examples. The <select> HTML element as implemented in Chrome/Firefox (Windows/Linux) provides this functionality too.
Moreover, a menu as defined by the W3C is required to be navigable using these two buttons.

How Has This Been Tested?

A new unit test was created for checking the new behaviour.

Markup:

<template>
  <v-container>
    <v-select
      :items="[
        {
          text: 'foo',
          disabled: true,
        },
        'bar',
        'hello',
        'world'
      ]"
      label="pick one"
    />
  </v-container>
</template>

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Improvement/refactoring (non-breaking change that doesn't add any features but makes things better)

Checklist:

• The PR title is no longer than 64 characters.
• The PR is submitted to the correct branch (master for bug fixes and documentation updates, dev for new features and backwards compatible changes and next for non-backwards compatible changes).
• My code follows the code style of this project.
• I've added relevant changes to the documentation (applies to new features and breaking changes in core library)

The last checklist item is not necessary in my opinion. Please correct me if I am wrong.

[KaelWD]

https://www.w3.org/TR/wai-aria-practices/#menubutton only mentions up/down, and none of the sections you linked explicitly state that home/end should also open the menu.

[janKollars]

You are absolutely correct! While focusing a select, home and end should only select the first/last selectable item and should not open the menu.
Sorry for the inconvenience. I will fix this as soon as I can.

[johnleider]

Suggested change

	const tile = this.tiles[this.tiles.length - 1]
	const tile = this.tiles[this.tiles.length - 1]

[johnleider]

Suggested change

	const tile = this.tiles[0]
	const tile = this.tiles[0]

[janKollars]

I incorporated the feedback. When you test the changes, you might notice a bug: The select loses the focus after up/down/home/end was pressed. This problem was not introduced by my changes.
I created an issue for this #12572