* OverlayContext, useOverlayContext, and OverlayProvider

* useOverlay to register, remove, and track isTopMostOverlay

* Export overlay context related components and hooks and include provider in LG provider

* README and changeset

* Fix type and lint

* Update registerOverlay logic and use more explicit generic type names

* PopoverContext supports additional props and marks isPopoverOpen and setIsPopoverOpen deprecated

* Replace PortalContext with newly extended PopoverContext

* Changesets

* Add todo in select spec and update todos with jira tix

…ClassName prop (#2457)

* Refactor popover styles

* Remove redundant contentClassName prop

* Clean up Popover positioning logic

* Changesets

* Reorg code

* useIsomorphicLayoutEffect instead of useMemo

* Update changesets

* Revert changes

* Add @floating-ui/react dependency

* Clean up Popover stories

* Replace position utils and usePopoverPositioning with useFloating

* Remove replaced positioning hook and utils

* Fix adjustOnMutation and stories

* Changeset

* Add useMergeRefs hook

* Address feedback

* Update Popover default spacing from 10 to 4

* Changeset

* Update README and stories

…2474)

* Remove justify fit from @leafygreen-ui/popover

* Remove justify fit usage in packages using Popover

* Changeset

* Fix usePortal={false} transition and className order

* Replace usePortal with renderMode and add top layer render mode in Popover

* Replace usePortal with renderMode and add top layer render mode in LG Provider

* Refactor types in Popover-consuming packages

* README

* Address feedback

* Replace usePortal with renderMode and refactor Popover-consuming components

* Fix tooltip hover delays

* Initial feedback

* Additional feedback

* Fix transition

* Fix stories

* Add addJSXAttributes code mod util

* Update consolidateJSXAttributes util to handle edge case

* Add removeJSXAttributes code mod util

* Fix comment utils

* Export utils from utils/transformations

* Add popover-v12 codemod

* Changeset

* Fix build type

* Clean up comments

* Update docs

* Add commentOverride

* Update transform.config.js

* Fix Modal escape key close

* Address feedback

* Update ModalPopoverContext docs

* LG-4525: MigrationProvider with forceUseTopLayer flag (#2514)

* Add MigrationContext for global props

* Integrate forceUseTopLayer flag into Popover component

* Fix Copyable tooltip spec

* Update test