Infrastructure: Add Prettier Stylelint config

[nschonni]

Related to #1180
Was built off the same branch, so there is overlap with the config, and then suppressing the option in the Stylelint config

[github-actions]

Examples without any regression tests:

button/button_idl.html
dialog-modal/alertdialog.html


Examples missing some regression tests:

combobox/combobox-autocomplete-both.html:
    combobox-id
combobox/combobox-autocomplete-list.html:
    combobox-id
combobox/combobox-autocomplete-none.html:
    combobox-id
combobox/grid-combo.html:
    textbox-key-down-arrow
    textbox-key-up-arrow
dialog-modal/datepicker-dialog.html:
    textbox-aria-describedby
menu-button/menu-button-actions-active-descendant.html:
    menu-up-arrow
    menu-down-arrow
    menu-character
spinbutton/datepicker-spinbuttons.html:
    spinbutton-down-arrow
    spinbutton-up-arrow
    spinbutton-page-down
    spinbutton-page-up
    spinbutton-home
    spinbutton-end
toolbar/toolbar.html:
    toolbar-tab
    toolbar-right-arrow
    toolbar-left-arrow
    toolbar-home
    toolbar-end
    toolbar-toggle-esc
    toolbar-toggle-enter-or-space
    toolbar-radio-enter-or-space
    toolbar-radio-down-arrow
    toolbar-radio-up-arrow
    toolbar-button-enter-or-space
    toolbar-menubutton-enter-or-space-or-down-or-up
    toolbar-menu-enter-or-space
    toolbar-menu-down-arrow
    toolbar-menu-up-arrow
    toolbar-menu-escape
    toolbar-spinbutton-down-arrow
    toolbar-spinbutton-up-arrow
    toolbar-spinbutton-page-down
    toolbar-spinbutton-page-up
    toolbar-checkbox-space
    toolbar-link-enter-or-space
    toolbar-aria-controls
    toolbar-button-aria-pressed
    toolbar-button-aria-hidden
    toolbar-radiogroup-role
    toolbar-radiogroup-aria-label
    toolbar-radio-role
    toolbar-radio-aria-checked
    toolbar-radio-aria-hidden
    toolbar-button-aria-disabled
    toolbar-menubutton-aria-label
    toolbar-menubutton-aria-haspopup
    toolbar-menubutton-aria-controls
    toolbar-menubutton-aria-expanded
    toolbar-menu-role
    toolbar-menu-aria-label
    toolbar-menuitemradio-role
    toolbar-menuitemradio-aria-checked
    toolbar-menuitemradio-tabindex
    toolbar-spinbutton-role
    toolbar-spinbutton-aria-label
    toolbar-spinbutton-aria-valuenow
    toolbar-spinbutton-aria-valuetext
    toolbar-spinbutton-aria-valuemin
    toolbar-spinbutton-aria-valuemax


Examples documentation table rows without data-test-ids:

dialog-modal/alertdialog.html
    "Keyboard Support" table(s):
       Tab
       Shift + Tab
       Escape
       Command + S
       Control + S
    "Attributes" table(s):
       alertdialog
       aria-labelledby=IDREF
       aria-describedby=IDREF
       aria-modal=true
       alert

SUMMARTY:

  55 example pages found.
  2 example pages have no regression tests.
  8 example pages are missing approximately 61 out of approximately 775 tests.

ERROR - missing tests:

  Please write missing tests for this report to pass.

[nschonni]

Thus is undoing the what is set in the config, because I had the config from a larger branch looking at Prettier across the different file types

[spectranaut]

looks good to me! :)

[smhigley]

looks great to me!