feat(ui5-ai-textarea): introduce new component

packages/ai/README.md

@@ -15,6 +15,7 @@ Provides web components implementing AI-related visual and interaction.
 | Button                   | `ui5-ai-button`                | `import "@ui5/webcomponents-ai/dist/Button.js";`        |
 | Button State             | `ui5-ai-button-state`          | comes with `ui5-ai-button`                              |
 | PromptInput              | `ui5-ai-prompt-input`          | `import "@ui5/webcomponents-ai/dist/PromptInput.js";`   |
+| TextArea                 | `ui5-ai-textarea`              | `import "@ui5/webcomponents-ai/dist/TextArea.js";`      |
 
 ## Provided assets