feat: chat input text area with sent button

[shivang-git]

Introduction

1. Chat Text Field: Enables users to conveniently compose messages with a dedicated text input area.
2. Chat Bubbles: Visually represents messages, enhancing readability and conversation flow.

Implementation Details:

• Chat Text Field:
  • Uses Textfield widget for chat inputs.
  • For handling data in input field TextEditingController property is used.

• Chat Bubbles:
  -Sent messages are rendered immediately by appending data to List<Map> messages variable.