Updated: Implemented Local Query Module & Documentation in querylocal.py

Hey there!, In this pull request I have made this following contributions :

Python Module to run queries : I have added a module named LocalQueryRunner. This module contains a class named RunLocalQuey. This class have a method named get_response that takes a prompt parameter and returns the response from LLM. A user can use this module in a separate python file by using this spinnet :-
```
    from LocalQueryRunner.querylocal import RunLocalQuey

    runner = RunLocalQuey()
    while True:
        user_input = input("<user> ")
        response = runner.get_response(prompt=user_input)
        print(f"\n<model> {response}")
```
Updated the docs according to the modifications I made : As per the modifications I made I also updated the instruction for a user to run queries locally.

GoogleCloudPlatform / localllm