feat: init in-course AI features

apps/web/components/Objects/Editor/Extensions/NoTextInput/NoTextInput.tsx

@@ -0,0 +1,21 @@
+import { Extension } from '@tiptap/core';
+import { Plugin, PluginKey } from 'prosemirror-state';
+
+export const NoTextInput = Extension.create({
+    name: 'noTextInput',
+  
+    addProseMirrorPlugins() {
+      return [
+        new Plugin({
+          key: new PluginKey('noTextInput'),
+          filterTransaction: (transaction) => {
+            // If the transaction is adding text, stop it
+            return !transaction.docChanged || transaction.steps.every((step) => {
+              const { slice } = step.toJSON();
+              return !slice || !slice.content.some((node: { type: string; }) => node.type === 'text');
+            });
+          },
+        }),
+      ];
+    },
+  });