Added conversion support for markdown equations to notion format.

[egordm]

This PR adds an additional renderer (LatexNotionPyRenderer) which converts

• Inline Equation $y = ax + b$ is translated to $$y = ax + b$$
• Block Equation $$y = ax + b$$ is translated to notion EquationBlock.

While Inline Equation uses notion accepted format ($$) it is not yet translated to an actual inline-block. There is a PR pending in notion-py for this (https://github.com/jamalex/notion-py/pull/247).

A relevant issue for this is #20

Example usage:

from md2notion.NotionPyRenderer import LatexNotionPyRenderer
from md2notion.upload import convert

mdFile1 = io.StringIO('$y = ax + b$\n$$\ny = ax + b \n $$')
mdFile1.__dict__["name"] = path

[Cobertos]

Hey, thanks for the implementation of this!

Just a couple things:

• Can this add a few tests to ensure this will work into the future as this library changes?
• I do like the new renderer class, though in #21, we added an extension feature thingy which extends the base class token detection at runtime via additive CLI flags. Can we use that instead so that we can do something like --html-img --latex for the CLI?

[egordm]

Hey @Cobertos,

Thanks for the feedback. I have changed the code to use an extension instead and added a few tests.

[Cobertos]

This looks great!

Any reason you can think of to not have latex extension be on by default? I'd like to keep feature parity where possible with Notion's uploader and #20 seems to suggest that it is default in Notion's uploader

I'll pull this down and give it a test by the end of the week

[Cobertos]

Looks like the upstream PR is merged. Testing it out rn