Improved deeplake.py init documentation

[nvoxland-al]

Description

Updated documentation for DeepLakeVectorStore init method.

Especially the exec_option docs needed improvement, but did a general cleanup while I was looking at it.

Type of Change

Please delete options that are not relevant.

• Documentation Fix

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• I stared at the code and made sure it makes sense

Suggested Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added Google Colab support for the newly added notebooks.
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I ran make format; make lint to appease the lint gods

[hatianzhang]

@nvoxland could you pull our latest main and change to new file. 0.10 change our code structure a lot and you need to update to new file. lmk if you need any help

[hatianzhang]

make a new pr to address this #10735

[nvoxland-al]

Thanks for getting it fixed up and merged, @hatianzhang !