move nodes and marks to a separate folder, add missing extensions

docs/src/docPages/api/nodes/paragraph.md

@@ -0,0 +1,35 @@
+# Paragraph
+Yes, the schema is very strict. Without this extension you won’t even be able to use paragraphs in the editor.
+
+:::warning Breaking Change from 1.x → 2.x
+tiptap 1 tried to hide that node from you, but it has always been there. You have to explicitly import it from now on (or use `defaultExtensions()`).
+:::
+
+## Installation
+```bash
+# with npm
+npm install @tiptap/extension-paragraph
+
+# with Yarn
+yarn add @tiptap/extension-paragraph
+```
+
+## Settings
+| Option | Type   | Default | Description                                  |
+| ------ | ------ | ------- | -------------------------------------------- |
+| class  | string | –       | Add a custom class to the rendered HTML tag. |
+
+## Commands
+| Command   | Options | Description                                  |
+| --------- | ------- | -------------------------------------------- |
+| paragraph | —       | Transforms all selected nodes to paragraphs. |
+
+## Keyboard shortcuts
+* Windows & Linux: `Control` `Alt` `0`
+* macOS: `Cmd` `Alt` `0`
+
+## Source code
+[packages/extension-paragraph/](https://github.com/ueberdosis/tiptap-next/blob/main/packages/extension-paragraph/)
+
+## Usage
+<demo name="Extensions/Paragraph" highlight="11,29" />