Create accessibility documentation for our components

[jessiehuff]

Describe the issue. What is the expected and unexpected behavior?
We should add an accessibility tab to each component's documentation explaining the general accessibility considerations and requirements so that users have a greater understanding of how to use PF components accessibly.

Is this a bug or enhancement? If this issue is a bug, is this issue blocking you or is there a work-around?
Enhancement

Related issue(s):

• Add template/guidelines for component a11y docs #2960

Components to be documented (moving forward, follow the writing a11y documentation wiki page):

• Add a11y documentation for About Modal #2550
• Add a11y documentation for Accordion #2551
• Add a11y documentation for Action list #2552
• Add a11y documentation for Alert #2566
• Add a11y documentation for Alert Group #2568
• Add a11y documentation for Application Launcher #2574
• Add a11y documentation for Avatar #2573
• Add a11y documentation for Backdrop #2687
• Add a11y documentation for Background Image #2690
• Add a11y documentation for Badge #2768
• Add a11y documentation for Banner #2751
• Add a11y documentation for Brand #2777
• Add a11y documentation for Breadcrumb #2564
• Add a11y documentation for Button #2557
• Add a11y documentation for Calendar Month #2714
• Add a11y documentation for Card #2576
• Add a11y documentation for Check/Checkbox #2578
• Add a11y documentation for Chip #2779
• Add a11y documentation for Chip group #2579
• Add a11y documentation for Clipboard copy #2580
• Add A11y documentation for Code Editor #2801
• Add a11y documentation for Context selector #2581
• Data list
• Date picker
• Description list
• Divider
• Drawer
• Add a11y documentation for Dropdown #2582
• Dual List Selector
• Empty state
• add a11y docs for Expandable section #2824
• File upload
• Form
• Form control
• Form select
• Add a11y documentation for Helper Text #2917
• Hint
• Add a11y docs for Icon #3810
• Inline edit
• Input group
• add a11y docs for Jump links #2825
• Add a11y documentation for Label #2584
• Label group (will be covered by Label and Label Group - merge a11y docs #3460 )
• List
• Login page
• Masthead
• Add a11y documentation for Menu #3255
• Add a11y documentation for Menu Toggle #3264
• Add a11y documentation for Modal #2585
• Add a11y documentation for Navigation #3253
• Notification badge
• Notification Drawer
• Number input
• Options menu
• Overflow menu
• Add a11y documentation for Page #2601
• Pagination
• Add a11y documentation for Popover #2590
• Add a11y documentation for Progress #3244
• Add a11y documentation for Radio #4187
• Search input
• Add a11y documentation for Select #2591
• Add a11y documentation for Sidebar #2683
• Simple List
• Add a11y documentation for Skeleton #2592
• Add a11y documentation for Skip to content #2600
• Spinner
• Add a11y docs for Switch #4120
• Tab Content
• Add a11y documentation for Table #2594
• Add a11y documentation for Tabs #2593
• Text
• Text area
• Text input
• Tile
• Add a11y documentation for Title #2598
• Time picker
• Toggle group
• Add a11y documentation for Toolbar #2595
• Add a11y documentation for Tooltip #2596
• Add a11y documentation for Tree view #2599
• Add a11y documentation for Wizard #2597

Components that need updating to follow the new a11y doc writing guidelines:

• Update a11y documentation for Alert/Alert Group #3034
• Update a11y documentation for Tabs #3071
• Update a11y documentation for About Modal #3795
• Update a11y docs for Action List #3241
• Update a11y docs for Application Launcher #3257
• Update a11y documentation for Avatar #3242
• chore(backdrop): update a11y information #3248
• Background image #3251
• Update a11y docs for Badge #3276
• Update a11y documentation for Banner #3258
• Update a11y docs for Brand #3278
• Update a11y docs for Breadcrumb #3280
• Update a11y docs for Button #3286
• Update a11y docs for Calendar Month #3288
• Update a11y documentation for Card #3112
• Update a11y docs for Checkbox #3292
• Update a11y docs for Chip and ChipGroup #3294
• Update a11y docs for Clipboard Copy #3378
• Update a11y documentation for Code Editor #3797
• Context Selector (deprecated, no update required)
• Update a11y docs for Expandable Section #3800
• Update a11y docs for Helper Text #3804
• Update a11y docs for Jump Links #3807
• Label (will be covered by Label and Label Group - merge a11y docs #3460 )
• Update a11y docs for Modal #3346
• Update a11y docs for Page #3874
• Update a11y docs for Sidebar #3811
• Update a11y docs for Skeleton #3809
• Update a11y docs for Skip To Content #3825
• Update a11y docs for Title #3826
• Update a11y docs for Tree View #3875