Enhance logging configuration to support optional Rich logging

[aniketmaurya]

What does this PR do?

Errors will be nicely rendered if rich is enabled. This will help in debugging.

Example

import litserve as ls

ls.configure_logging(use_rich=True)

class SimpleLitAPI(ls.LitAPI):
    def setup(self, device):
        self.model1 = lambda x: x**2
        self.model2 = lambda x: x**3

    def decode_request(self, request):
        return request["input"]

    def predict(self, x):
        a = self.model1(x)
        b = self.model2(x)
        c = a + b
        return {"output": c}

    def encode_response(self, output):
        return {"output": output}

if __name__ == "__main__":
    server = ls.LitServer(SimpleLitAPI(enable_async=True))
    server.run(port=8000)

Before submitting

• Was this discussed/agreed via a Github issue? (no need for typos and docs improvements)
• Did you read the contributor guideline, Pull Request section?
• Did you make sure to update the docs?
• Did you write any new necessary tests?

PR review

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[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 86%. Comparing base (fb96478) to head (ba9e7eb).
Report is 1 commits behind head on main.

Additional details and impacted files

@@         Coverage Diff         @@
##           main   #510   +/-   ##
===================================
- Coverage    86%    86%   -0%     
===================================
  Files        37     37           
  Lines      2372   2384   +12     
===================================
+ Hits       2040   2049    +9     
- Misses      332    335    +3     

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