feat: add setMeta command

docs/src/docPages/api/commands/set-meta.md

@@ -0,0 +1,21 @@
+# setMeta
+Store a metadata property in the current transaction.
+
+## Parameters
+`key: string`
+
+The name of your metadata. You can get its value at any time with [getMeta](https://prosemirror.net/docs/ref/#state.Transaction.getMeta).
+
+`value: any`
+
+Store any value within your metadata.
+
+## Usage
+```js
+// Prevent the update event from being triggered
+editor.commands.setMeta('preventUpdate', true)
+
+// Store any value in the current transaction.
+// You can get this value at any time with tr.getMeta('foo').
+editor.commands.setMeta('foo', 'bar')
+```

docs/src/links.yaml

@@ -208,6 +208,8 @@
         - title: setMark
           link: /api/commands/set-mark
           type: draft
+        - title: setMeta
+          link: /api/commands/set-meta
         - title: setNode
           link: /api/commands/set-node
           type: draft