add list of current commands

docs/src/data/posts/commands.md

@@ -1 +1,33 @@
-# Commands
+# Commands
+
+## .clearContent()
+
+Clear the whole document.
+
+## .focus()
+
+Focus the editor at the given position.
+
+## .insertHTML()
+
+Insert a string of HTML at the currently selected position.
+
+## .insertText()
+
+Insert a string of text at the currently selected position.
+
+## .removeMarks()
+
+Remove all marks in the current selection.
+
+## .selectAll()
+
+Select the whole document.
+
+## .setContent()
+
+Replace the whole document with new content.
+
+## .toggleNode()
+
+Toggle a node with another node.