Update README file

[dorbanianas]

After adding the readme now we should update the getting started section so there's no need for the whole config that we used to do before, also I made an update to the whole structure to align with our current state

[neubig]

I was successfully able to run make build and make setup-config but when I ran make run I got the following error, is this a known bug or should I create an issue?

Also, this PR has conflicts with main in README.md, could you resolve those?

[dorbanianas]

@neubig is there any errors shown in the log file or the terminal for the backend?

[neubig]

Ah, yes, lots of thes:

8:19:29 PM [vite] ws proxy error:
AggregateError [ECONNREFUSED]: 
    at internalConnectMultiple (node:net:1116:18)
    at afterConnectMultiple (node:net:1680:7)
8:19:29 PM [vite] http proxy error: /litellm-models
AggregateError [ECONNREFUSED]: 
    at internalConnectMultiple (node:net:1116:18)
    at afterConnectMultiple (node:net:1680:7)
8:19:29 PM [vite] http proxy error: /litellm-agents
AggregateError [ECONNREFUSED]: 
    at internalConnectMultiple (node:net:1116:18)
    at afterConnectMultiple (node:net:1680:7)
8:19:29 PM [vite] http proxy error: /litellm-models
AggregateError [ECONNREFUSED]: 
    at internalConnectMultiple (node:net:1116:18)
    at afterConnectMultiple (node:net:1680:7)
    ```

[neubig]

It's probably an instance of this: #508

[neubig]

Looks good, thanks!