10.0-dev
portico: Add user avatars directory.
portico: Update screenshots for "for/business", "for/open-source" pages.
portico: Update screenshots for "for/education" page.
portico: Update screenshots for "for/events" page.
portico: Update screenshots for "for/research" page.
ruff: Fix UP007 Use `X | Y` for type annotations.
ruff: Fix B905 `zip()` without an explicit `strict=` parameter.
tools: Replace `realm_uri` with `realm_url`.
portico: Extend the script to generate thread screenshots.