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

---------

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/libraries.md

@@ -118,46 +118,35 @@ _Remember to run `docker compose up -d` to register the changes. Make sure you c
 
 These actions must be performed by the Immich administrator.
 
-- Click on your avatar in the upper right corner
-- Click on Administration -> External Libraries
-- Click on Create an external library…
-- Select which user owns the library, this can not be changed later
-- Enter `/mnt/media/christmas-trip` then click Add
-- Click on Save
-- Click the drop-down menu on the newly created library
-- Click on Scan
-- Click the drop-down menu on the newly created library
-- Click on Rename Library and rename it to "Christmas Trip"
+- Click on your avatar in the upper right corner.
+- Click on `Administration -> External Libraries`.
+- Click on `Create Library`.
+- Select which user owns the library, this **can not** be changed later
+- You are now entering the library management page.
+- Click on `Add` in the `Folders` section.
+- Enter `/mnt/media/christmas-trip` then click Add.
+- Click on `Edit` Library and rename it to "Christmas Trip".
 
 NOTE: We have to use the `/mnt/media/christmas-trip` path and not the `/mnt/nas/christmas-trip` path since all paths have to be what the Docker containers see.
 
 Next, we'll add an exclusion pattern to filter out raw files.
 
-- Click the drop-down menu on the newly-created Christmas library
-- Click on Manage
-- Click on Scan Settings
-- Click on Add Exclusion Pattern
-- Enter `**/Raw/**` and click save.
-- Click save
-- Click the drop-down menu on the newly created library
-- Click on Scan
+- Click on `Add` in the `Exclusion Patterns` section.
+- Enter `**/Raw/**` and click Add.
+- Click on `Scan`
 
 The christmas trip library will now be scanned in the background. In the meantime, let's add the videos and old photos to another library.
 
-- Click on Create External Library.
-
-:::note
-If you get an error here, please rename the other external library to something else. This is a bug that will be fixed in a future release.
-:::
-
-- Click the drop-down menu on the newly created library
-- Click Edit Import Paths
-- Click on Add Path
+- Go back to `Administration -> External Libraries`.
+- Click on `Create Library`.
+- Select which user owns the library,
+- You are now entering the library management page.
+- Click on `Add` in the `Folders` section.
 - Enter `/mnt/media/old-pics` then click Add
-- Click on Add Path
+- Click on `Add` in the `Folders` section.
 - Enter `/mnt/media/videos` then click Add
-- Click Save
-- Click on Scan
+- Click on `Scan`
+- Click on `Edit` Library and rename it to "Old videos and photos".
 
 Within seconds, the assets from the old-pics and videos folders should show up in the main timeline.