docs(libraries): init docs for slate sub-libraries (#3645)

* docs(libraries): init docs for slate sub-libraries

Signed-off-by: irmerk <jolenelanglinais@gmail.com>

* docs(libraries): reword slate history summary

Co-authored-by: Cameron Ackerman <cameron_ackerman@selinc.com>

Co-authored-by: Cameron Ackerman <cameron_ackerman@selinc.com>

docs/Summary.md

@@ -32,6 +32,12 @@
 - [Refs](./api/refs.md)
 - [Miscellaneous](./api/miscellaneous.md)
 
+## Libraries
+
+- [Slate React](./libraries/slate-react.md)
+- [Slate History](./libraries/slate-history.md)
+- [Slate Hyperscript](./libraries/slate-hyperscript.md)
+
 ## General
 
 - [Resources](./general/resources.md)

docs/libraries/slate-history.md

@@ -0,0 +1,15 @@
+# Slate History
+
+This sub-library tracks changes to the Slate value state over time, and enables undo and redo functionality.
+
+## `History`
+
+`History` objects hold all of the operations that are applied to a value, so they can be undone or redone as necessary.
+
+## `HistoryEditor`
+
+`HistoryEditor` contains helpers for history-enabled editors.
+
+## `withHistory`
+
+The `withHistory` plugin keeps track of the operation history of a Slate editor as operations are applied to it, using undo and redo stacks.

docs/libraries/slate-hyperscript.md

@@ -0,0 +1,3 @@
+# Slate Hyperscript
+
+This package contains a hyperscript helper for creating Slate documents with JSX!

docs/libraries/slate-react.md

@@ -0,0 +1,140 @@
+# Slate React
+
+This sub-library contains the React-specific logic for Slate.
+
+## Components
+
+React components for rendering Slate editors
+
+###### `RenderElementProps`
+
+`RenderElementProps` are passed to the `renderElement` handler.
+
+###### `RenderLeafProps`
+
+`RenderLeafProps` are passed to the `renderLeaf` handler.
+
+###### `Editable`
+
+The main Slate editor.
+
+###### `DefaultElement(props: RenderElementProps)` 
+
+The default element renderer.
+
+###### `DefaultLeaf(props: RenderLeafProps)` 
+
+The default custom leaf renderer.
+
+###### `Slate(editor: ReactEditor, value: Node[], children: React.ReactNode, onChange: (value: Node[]) => void, [key: string]: any)`
+
+A wrapper around the provider to handle `onChange` events, because the editor is a mutable singleton so it won't ever register as "changed" otherwise.
+
+## Hooks
+
+React hooks for Slate editors
+
+###### `useEditor`
+
+Get the current editor object from the React context.
+
+###### `useFocused`
+
+Get the current `focused` state of the editor.
+
+###### `useReadOnly`
+
+Get the current `readOnly` state of the editor.
+
+###### `useSelected`
+
+Get the current `selected` state of an element.
+
+###### `useSlate`
+
+Get the current editor object from the React context.
+
+## ReactEditor
+
+A React and DOM-specific version of the `Editor` interface. All about translating between the DOM and Slate.
+
+###### `findKey(editor: ReactEditor, node: Node)`
+
+Find a key for a Slate node.
+
+###### `findPath(editor: ReactEditor, node: Node)`
+
+Find the path of Slate node.
+
+###### `isFocused(editor: ReactEditor)`
+
+Check if the editor is focused.
+
+###### `isReadOnly(editor: ReactEditor)`
+
+Check if the editor is in read-only mode.
+
+###### `blur(editor: ReactEditor)`
+
+Blur the editor.
+
+###### `focus(editor: ReactEditor)`
+
+Focus the editor.
+
+###### `deselect(editor: ReactEditor)`
+
+Deselect the editor.
+
+###### `hasDOMNode(editor: ReactEditor, target: DOMNode, options: { editable?: boolean } = {})`
+
+Check if a DOM node is within the editor.
+
+###### `insertData(editor: ReactEditor, data: DataTransfer)`
+
+Insert data from a `DataTransfer` into the editor.
+
+###### `setFragmentData(editor: ReactEditor, data: DataTransfer)`
+
+Sets data from the currently selected fragment on a `DataTransfer`.
+
+###### `toDOMNode(editor: ReactEditor, node: Node)`
+
+Find the native DOM element from a Slate node.
+
+###### `toDOMPoint(editor: ReactEditor, point: Point)`
+
+Find a native DOM selection point from a Slate point.
+
+###### `toDOMRange(editor: ReactEditor, range: Range)`
+
+Find a native DOM range from a Slate `range`.
+
+###### `toSlateNode(editor: ReactEditor, domNode: DOMNode)`
+
+Find a Slate node from a native DOM `element`.
+
+###### `findEventRange(editor: ReactEditor, event: any)`
+
+Get the target range from a DOM `event`.
+
+###### `toSlatePoint(editor: ReactEditor, domPoint: DOMPoint)`
+
+Find a Slate point from a DOM selection's `domNode` and `domOffset`.
+
+###### `toSlatePoint(editor: ReactEditor, domPoint: DOMPoint)`
+
+Find a Slate range from a DOM range or selection.
+
+## Plugins
+
+React-specific plugins for Slate editors
+
+###### `withReact(editor: Editor)`
+
+Adds React and DOM specific behaviors to the editor.
+
+## Utils
+
+Private convenience modules
+