docs: update documentation (#25440)

* docs: beginning of the year tune up and updates

* darker dark

* backup information

* promote to table of content

* Apply suggestions from code review

Co-authored-by: Mert <101130780+mertalev@users.noreply.github.com>
Co-authored-by: Mees Frensel <33722705+meesfrensel@users.noreply.github.com>

* restore and backup

* edit

* Apply suggestions from code review

Co-authored-by: bo0tzz <git@bo0tzz.me>

* feedback

* more information on mobile

Co-authored-by: https://github.com/aviv926

* more information on free up space
>
> Co-authored-by: jtagcat <git-12dbd862@jtag.cat>

* Update docs/docs/features/mobile-app.mdx

Co-authored-by: jtagcat <git-12dbd862@jtag.cat>

* screenshot and minor tweaks

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Co-authored-by: Mert <101130780+mertalev@users.noreply.github.com>
Co-authored-by: Mees Frensel <33722705+meesfrensel@users.noreply.github.com>
Co-authored-by: bo0tzz <git@bo0tzz.me>
Co-authored-by: jtagcat <git-12dbd862@jtag.cat>

docs/docs/features/facial-recognition.md

@@ -21,14 +21,14 @@ The asset detail view will also show the faces that are recognized in the asset.
 Additional actions you can do include:
 
 - Changing the feature photo of the person
-- Setting a person's date of birth
-- Merging two or more detected faces into one person
 - Hiding the faces of a person from the Explore page and detail view
-- Assigning an unrecognized face to a person
+- Setting a person's date of birth, so that the age of the person can be shown at the time the photo was taken
+- Merging two or more detected people into one person
+- Favoriting a person to pin them to the top of the list
 
 It can be found from the app bar when you access the detail view of a person.
 
-<img src={require('./img/facial-recognition-4.webp').default} title='Facial Recognition 4' width="70%"/>
+<img src={require('./img/facial-recognition-4.webp').default} title='Facial Recognition 4' />
 
 ## How Face Detection Works