Update generic exception `MeilisearchException` to throw more accurate Exception

[239yash]

Pull Request

Related issue

Fixes #678

What does this PR do?

• PR updates the generic exception(MeilisearchException) throws from function to exact exception throws
• Created a new exception MeilisearchUrlException for handling MalformedUrlException

PR checklist

Please check if your PR fulfills the following requirements:

• [x] Does this PR fix an existing issue, or have you listed the changes applied in the PR description (and why they are needed)?
• [x] Have you read the contributing guidelines?
• [x] Have you made sure that the title is accurate and descriptive of the changes?

Thank you so much for contributing to Meilisearch!

[239yash]

Hi @curquiza Yes, I will add the integration tests too. Thanks

[curquiza]

@239yash did you have a chance to work on it?

[239yash]

@curquiza hi, I am working on this. I will submit the PR by coming weekend. Thanks

[curquiza]

Closing this for lack of activity. Feel free to re-open of course if you have time to work on it @239yash ❤️ I'm just doing some cleaning