docs: add udf rewriting blog post

[hussainsultan]

Description of changes

Add a blog post detailing the experience of adding and rewriting a UDF using Ibis. The use-case is to perform predicate pushdown on a special UDF that is capable of running and pruning XGBoost trees.

Zulip chat: predicate pushdown mechanism that works on XGBoost/GBM models

Issues closed

None

[hussainsultan]

@IndexSeek Ready for your review, when you get a chance. Thank you.

[ibis-docs-bot]

Docs preview: https://pr-10763-0e565e1219a11cfc021330d9eddbd84025e94693--ibis-quarto.netlify.app

• docs/posts/udf-rewriting/index.qmd

[IndexSeek]

This looks great, @hussainsultan! I just proofread and gave some grammatical feedback. I tried quickgrove the other day, and it worked well!

We usually try not to exceed 90 characters per line to make it easier to review/edit, could you wrap those? (https://ibis-project.org/contribute/03_style#text-formatting)

[hussainsultan]

I just wrapped text lines and also changed to using sentence case for headers.

You mentioned that you left some comments; I am not seeing any comments in this PR yet. Just let me know and I will be happy to make any other changes. Thank you.

[IndexSeek]

Sorry, I never submitted the feedback! It looks like it has been outdated now, let me re-update!

[ibis-docs-bot]

Docs preview: https://pr-10763-f172ccd16f14fdb135601b9fce7107858912d9b2--ibis-quarto.netlify.app

• docs/posts/udf-rewriting/index.qmd

[hussainsultan]

I believe I addressed all comments and thank you @IndexSeek

[IndexSeek]

This looks awesome! Thanks for wrapping everything. I really like the story this tells and I tried it the other day, it worked great!

[cpcloud]

I fixed the lint failure, so this should be good to go. I'll merge early next week, let's say Wednesday (?) if that's alright with everyone.

[cpcloud]

Great work, thank you!