Feat notion reader add db content

[HenryRoutson]

Description

unfinished currently, i am still working on this currently
putting this up to make sure no one does the same thing
and for feedback

working on fixing a number of bugs including

• type errors
• only downloading max 100 pages

And adding features

• notion database content download
• optional print progress indicators for long tasks

And most importantly
improved code quality,
with logic related to pagination and requests becoming more encapsulated

Fixes # (issue)

Version Bump?

Did I bump the version in the pyproject.toml file of the package I am updating? (Except for the llama-index-core package)

• Yes

Type of Change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Your pull-request will likely not be merged unless it is covered by some form of impactful unit testing.

• I added new unit tests to cover this change
• I believe this change is already covered by existing unit tests

i can add unit tests in future,
but for now i am using a large notion database as a realistic testing environment

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

[HenryRoutson]

if this is likely to get merged just let me know

[logan-markewich]

@HenryRoutson if it works, it'll get merged -- net new features are nice :)

[HenryRoutson]

Thanks! Just a heads up i am still working on it.

[logan-markewich]

Converting to draft since its still in progress (afaik)