Add zotero handler implementation

[ElinaKapetanaki]

Description

This is the Zotero Handler Implementation that is focused -for now- at connecting to the Zotero library of a user and selecting his/her annotations, which is highlighted text on research material (either all annotations, a specific one or all annotations on a specific item, like on a specific book). More information about the implementation can be found on the README file of the handler.

Fixes #5637

Type of change

• ⚡ New feature (non-breaking change which adds functionality)

Verification Process

To ensure the changes are working as expected:

• Test Location: Specify the URL or path for testing.
• Verification Steps: Outline the steps or queries needed to validate the change. Include any data, configurations, or actions required to reproduce or see the new functionality.

Checklist:

• My code follows the style guidelines(PEP 8) of MindsDB.
• I have appropriately commented on my code, especially in complex areas.
• Necessary documentation updates are either made or tracked in issues.
• Relevant unit and integration tests are updated or added.

[MinuraPunchihewa]

Hey @ElinaKapetanaki,
To continue our conversation on Slack here: is the pyzotero package installed in your virtual environment?

[ElinaKapetanaki]

Yes pyzotero is installed in my mindsdb-venv.

[MinuraPunchihewa]

@ElinaKapetanaki Please change this import to from mindsdb_sql.parser import ast and try again?

[ElinaKapetanaki]

Alright, will do. Is this the cause of the "not installed zotero handler" problem?

[MinuraPunchihewa]

I believe the handler has become unusable due to this error. Let me know if this fixes your issue. Try running the CREATE DATABASE statement again with this fix.

[ElinaKapetanaki]

Great!! The CREATE DATABASE statement worked now! I will work on fixing a few things more and will update this pr.

[ElinaKapetanaki]

The queries work!! Made quite a few changes to my code. I want to make it a bit cleaner and will update the pr with also some pictures of the functionality.

[MinuraPunchihewa]

@ElinaKapetanaki Sounds great! Just mark the PR as ready for review whenever you are ready and I will take a look.