Adjust the left alignment for text when bulleted or numbered (#24)

## What
This PR fixes the message indentation bug

## Why
For better user experience

## How
- Remove `st-chat` library
- Use `st.warning` and `st.info` for user and bot message

## Demo

| Before | <img width="718" alt="Screenshot 2023-05-19 at 11 37 53"
src="https://github.com/CoderPush/chatlit/assets/62679553/d5a971ba-eace-462d-ae4f-e0b5aa2f06ef">
|
|--------|-----------------------------------------|
| After | <img width="1272" alt="Screenshot 2023-06-19 at 1 12 55 PM"
src="https://github.com/CoderPush/chatlit/assets/62679553/71be0dc5-f023-4a40-a131-2a250d166598">
|

Pipfile

@@ -10,7 +10,6 @@ python-dotenv = "*"
 watchdog = "*"
 google-cloud-firestore = "*"
 firebase-admin = "*"
-streamlit-chat = {editable = true, git = "https://github.com/harley/st-chat.git"}
 streamlit-oauth = "*"
 promptlayer = "*"