(cherry picked from commit 7f99d44)

(cherry picked from commit 664382a)

Add Lumo to list

(cherry picked from commit 9b35aa4)

(cherry picked from commit c6bbb59)

and add a tool script for it.

(cherry picked from commit c7b47a3)

* Add speakernotes extension

(cherry picked from commit 096036e)

Correcting misspelt words in text

(cherry picked from commit dc09be9)

This should be `to write` not `write`

(cherry picked from commit 7bc94c3)

(cherry picked from commit aa89aac)

(cherry picked from commit a8c84ac)

Co-authored-by: Sam Albers <[email protected]>

(cherry picked from commit 30669ee)

(cherry picked from commit 707e9ca)

(cherry picked from commit e89dc6a)

Co-authored-by: Christophe Dervieux <[email protected]>
(cherry picked from commit 5b7c77f)

(cherry picked from commit 6b493ae)

(cherry picked from commit 28df7b9)

Co-authored-by: Carlos Scheidegger <[email protected]>

Added description of new short code extension `si`

(cherry picked from commit d339b40)

[Sync to prerelease] Update shortcodes-and-filters.yml

Remove `defaults: quarto` information temporarily.

(cherry picked from commit 3aacc39)

Brand edits

(cherry picked from commit 5389bc6)

(cherry picked from commit 8bf797e)

(cherry picked from commit 1667562)

(cherry picked from commit 72df10f)

(cherry picked from commit 377a986)

(cherry picked from commit e95b77b)

[Sync to prerelease] Blog post for dashboard video series