Base UI components progress

[michaldudak]

As discussed in mui/material-ui#6218, we are committed to providing unstyled versions of the components in @base_ui/react. This is an umbrella issue to have visibility on the progress.

• [accordion] Implement Accordion #25
• [Checkbox] Implement Checkbox with new API #24
• [CheckboxGroup] Implement CheckboxGroup #213
• [Collapsible] Implement Collapsible #84
• [dialog] Implement Dialog #215
• [Form] Implement Form #219
• [menu] Implement new API #214
• [popover] Implement Popover #35
• [number field] Implement NumberField with new API #185
• [PreviewCard] Create the unstyled component #451
• [Progress] Implement Progress #218
• [RadioGroup] Implement RadioGroup #26
• [scroll area] Implement ScrollArea #649
• [select] Implement new API #217
• [slider] Implement new API #216
• [Switch] Implement new API #4
• [tabs] Implement new API #212
• [TextField] Create the unstyled component #36
• [tooltip] Implement Tooltip #32
• [ToggleButton] Implement ToggleButton #11
• [ToggleButtonGroup] Implement ToggleButtonGroup #31
• [button] Create the ButtonGroup unstyled component #28
• [context menu] Create Context Menu component #51
• [meter] Implement Meter #662
• [toast] Implement Toast #220
• [toolbar] Implement Toolbar #661
• [combobox] Implement Combobox #222
• [drawer] Create the unstyled component #38
• [otp] Add a OtpInput or PinInput component #75
• [pagination] Create the unstyled component #29
• [rating] Create the unstyled component #30
• [textarea] Implement Textarea component #718

[oliviertassinari]

@michaldudak We heavily use the labels to function with our growing backlog of issues (13,000 at this point). I'm adding a new one.