PF6 Design guideline updates

[andrew-ronaldson]

This Epic captures the updates required for the PFv6 updates. Most of this work will be updating screenshots but there are also some documented CSS variables.

Component guideline updates

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1. Guideline updates: About modal #4298
   PF6 Design guidelines +1
   
2. Guideline updates: Accordions #4299
   PF Team PF6 Design guidelines +2
   
3. Guideline updates: Action list
4. Guideline updates: Alert
5. Guideline updates: Avatar
6. Guideline updates: Banner
7. Guideline updates: Breadcrumb
8. Guideline updates: Buttons #4274
   PF6 Design guidelines +1
   
9. Guideline updates: Cards & Tiles #4275
   PF6 Design guidelines +1
   
10. Guideline updates: Copy clipboard
11. Guideline updates: Code block & Code editor
12. Guideline updates: Context selector #4306
    PF6 Design guidelines +1
    
13. Guideline updates: List, Simple list, Data list & Decription list
14. Guideline updates: Calendar month #4301
    PF6 Design guidelines +1
    
15. Guideline updates: Divider #4303
    PF Team PF6 Design guidelines +2
    
16. Guideline updates: Drag and drop
17. Guideline updates: Drawer
18. Guideline updates: Dual list selector
19. Guideline updates: Empty state
20. Guideline updates: Expandable section
21. Guideline updates: File uploads
22. Guideline updates: Form elements
23. Guideline updates: Hint
24. Guidelines updates: Charts
25. Guideline updates: Inline edit
26. Guideline updates: Input group & Text input groups
27. Guideline updates: Jump links
28. Guideline updates: Label
29. Guideline updates: Login page
30. Guideline updates: Masthead
31. Guideline updates: Menu, Select, dropdown & Menu toggle
32. Guideline updates: Modal
33. Guideline updates: Navigation
34. Guideline updates: Notification badge (stateful button) & Notification drawer
35. Guideline updates: Number inputs
36. Guideline updates: Overflow menu
37. Guideline updates: Page #4273
    PF6 Design guidelines +1
    
38. Guideline updates: Pagination
39. Guideline updates: Panel
40. Guideline updates: Password strength
41. Guideline updates: Popover & Tooltips
42. Guideline updates: Progress & Progress stepper
43. Guideline updates: Search input
44. Guideline updates: Sidebar
45. Guideline updates: Slider
46. Guideline updates: Table
47. Guideline updates: Tabs
48. Guideline updates: Timestamp
49. Guideline updates: Toggle group
50. Guideline updates: Toolbar
51. Guideline updates: Treeview
52. Guideline updates: Truncate
53. Guideline updates: Wizard
54. Guideline updates: Design for accessibility page #4295
    PF6 Design guidelines +1
    
55. Guideline updates: Filters #4324
    PF Team PF6 Design guidelines +2
    

[edonehoo]

Note: this will also close #4076 (or we could close that one in favor of this more detailed epic)