docs(tex-complete): add initialPrompt description

Author: ivictbor

adminforth/documentation/docs/tutorial/05-Plugins/06-text-complete.md

@@ -88,3 +88,28 @@ export const admin = new AdminForth({
 Here is how it looks:
 
 !![alt text](dashboard_test2.gif)
+
+
+## Initial prompt
+
+
+If you want to generate field by your own prompt, you can use `initialPrompt` property in plugin configuration.
+
+```ts title="./resources/apartments.ts"
+    new TextCompletePlugin({
+      fieldName: 'description',
+//diff-add
+      initialPrompt: `I need to introduce apartment '{{title}}' to people who have a pets and afraid that apartment is not pet friendly. I need short but very attractive description if it. It should have CTAs and Emojis. write \n\n once you are done.`,
+//diff-add
+      expert: {
+//diff-add
+        stop: ['\n\n'],
+//diff-add
+        maxTokens: 500,
+//diff-add
+      },
+    }),
+```
+
+> **Note:** `{{title}}` is a placeholder for the value of the field `title`. It will be replaced with the actual value of the field when generating the prompt. You can use any field name from your resource configuration.
+> **Note:** `stop` is a property of the model that tells it when to stop generating text. In this case, we are telling it to stop when it sees `\n\n`.