Add Apache Pinot® as supported database about dataframe HOT 5 OPEN

@zaleslaw it seems like there is some confusion regarding the term "vote from community". Can you please help me understand what it means? On another note, while using a library for data science and data engineering, I noticed the absence of analytical data stores such as BigQuery, ClickHouse, or Druid and obviously Pinot, I believe having access to such tools could greatly enhance the library's capabilities and make it more useful for data professionals.

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@gAmUssA thanks for the suggestion, we will wait a little bit for a vote from the community regarding this issue

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@zaleslaw could you give a background why specific implementation is required? Why generic jdbc isn't option?

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@gAmUssA I am not sure for Apache Pinot, but for 4 supported databases we have de-facto different implementations and known bugs for JDBC protocol implementation in type mapping. And we decided to be accurate and support and test type generation step-by-step

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@zaleslaw I'm open to contribute pinot support to Dataframe framework. Could you kindly point me to resources that will alow me to do it. Are there Compatibility tests available to validate database implementations?

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