ng-chat-form disable

### Issue type

**I'm submitting a ...** (check one with "x")

* [ ] bug report
* [*] feature request

### Issue description

**Current behavior:**
how to disable nb-chat-form

**Expected behavior:**
when i block chat . i want nb-chat-form ->tag input disable

**Steps to reproduce:**




**Steps to reproduce:**
nebular: 11.0.0
angular: 16.0.0