Add content for documentary keynote (#1270)

Adding in the documentary and Q&A panel as a keynote. Updated PR as the
last one was not on a branch.

<!-- readthedocs-preview ep-website start -->
🖼️ Preview available 🖼️ :
https://ep-website--1270.org.readthedocs.build/
<!-- readthedocs-preview ep-website end -->

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Ege Akman <[email protected]>
Co-authored-by: Nikoś <[email protected]>
Co-authored-by: Ege Akman <[email protected]>
Co-authored-by: Nikoś <[email protected]>

Author: 4 people

src/content/keynoters/cultrepo.svg

@@ -0,0 +1,6 @@
+---
+name: '"Python: the Documentary" screening and Q&A'
+image: ./cultrepo.svg
+tagline: 'Keynote panel and screening of "Python: the Documentary" by CultRepo (formerly Honeypot)'
+order: 6
+---