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Initial version contains the generic classes and a implementation for
Azure AI Search.

TODO: other stores
TODO: tests

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Reordered the data folder
Removed NOT_EQUAL_TO filter clause
Changed search functions to search, get_search_result and
get_text_search_result for TextSearch and vectorizable_text_search and
vectorized_search for VectorSearch to reflect updates to dotnet.
Removed other query types for VectorSearch
Added exceptions and handling of no result error.

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---------

Co-authored-by: Tao Chen <[email protected]>

### Motivation and Context

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Syncing the python implementation with the dotnet work.

Introduces VectorStoreTextSearch
Methods on KernelPlugin
etc

Includes:

- Adding additional distance and index definitions
- Renamed to Top and Offset (instead of Count)
- restructured base classes for different search types
- add tests

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couple of small fixes for the integration tests

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Added new exceptions
Cleaned up the samples
removed old/commented code


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