docs(docs): 📝 add missing command docs

docs/api/commands/set-node-selection.md

@@ -1,5 +1,12 @@
 # setNodeSelection
+`setNodeSelection` creates a new NodeSelection at a given position. A node selection is a selection that points to a single node. [See more](https://prosemirror.net/docs/ref/#state.NodeSelection)
 
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+## Parameters
+`position: number`
+
+The position the NodeSelection will be created at.
+
+## Usage
+```js
+editor.commands.setNodeSelection(10)
+```