docs: facial recognition and general clean-up (#11106)

* add facial recognition docs, clean up existing info

* Update smart-search.md

Co-authored-by: Alex <alex.tran1502@gmail.com>

---------

Co-authored-by: Alex <alex.tran1502@gmail.com>

docs/docs/features/smart-search.md

@@ -7,29 +7,30 @@ Immich uses Postgres as its search database for both metadata and smart search.
 
 Smart search is powered by the [pgvecto.rs](https://github.com/tensorchord/pgvecto.rs) extension, utilizing machine learning models like [CLIP](https://openai.com/research/clip) to provide relevant search results. This allows for freeform searches without requiring specific keywords in the image or video metadata.
 
-Archived photos are not included in search results by default. To include them, mark the checkbox in [advanced search filters](/docs/features/smart-search#advanced-search-filters).
-
-:::tip Alternative CLIP Models
-More powerful models can be used for more accurate search results. For more information, see the related [FAQ](/docs/FAQ#can-i-use-a-custom-clip-model).
-:::
-
-:::info
-Smart Search is currently limited to 5,000 results for a single search on the web.
-:::
-
 ## Advanced Search Filters
 
 In addition, Immich offers advanced search functionality, allowing you to find specific content using customizable search filters. These filters include location, one or more faces, specific albums, and more. You can try out the search filters on the [Demo site](https://demo.immich.app).
 
-Smart search features include:
+The filters smart search allows you to search by include:
 
-- Search for one or more faces (with or without context search).
-- Search by Country or State or City or by all three.
-- Search by camera make and model.
-- Search by date range.
-- Search by file name.
-- Search by media types: image, video or all (**Note:** Image includes live images).
-- Search by condition: not in any album or archive or Favorite or all conditions.
+- People
+- Location
+  - Country
+  - State
+  - City
+- Camera
+  - Make
+  - Model
+- Date range
+- File name or extension
+- Media type
+  - Image (including live/motion photos)
+  - Video
+  - All
+- Condition
+  - Not in any album
+  - Archived
+  - Favorited
 
 <Tabs>
   <TabItem value="Computer" label="Computer" default>
@@ -47,3 +48,27 @@ Some search examples:
 
 </TabItem>
 </Tabs>
+
+## Configuration
+
+Navigating to `Administration > Settings > Machine Learning Settings > Smart Search` will show the options available.
+
+### CLIP model
+
+More powerful models can be used for more accurate search results, but are slower and can require more server resources. Check out the models [here][huggingface-clip] for more options!
+
+[Multilingual models][huggingface-multilingual-clip] are also available so users can search in their native language. These models support over 100 languages; the `nllb` models in particular support 200.
+:::note
+Multilingual models are much slower and larger and perform slightly worse for English than English-only models. For this reason, only use them if you actually intend to search in a language besides English.
+
+As a special case, the `ViT-H-14-quickgelu__dfn5b` and `ViT-H-14-378-quickgelu__dfn5b` models are excellent at many European languages despite not specifically being multilingual. They're very intensive regardless, however - especially the latter.
+:::
+
+Once you've chosen a model, change this setting to the name of the model you chose. Be sure to re-run Smart Search on all assets after this change.
+
+:::note
+Feel free to make a feature request if there's a model you want to use that we don't currently support.
+:::
+
+[huggingface-clip]: https://huggingface.co/collections/immich-app/clip-654eaefb077425890874cd07
+[huggingface-multilingual-clip]: https://huggingface.co/collections/immich-app/multilingual-clip-654eb08c2382f591eeb8c2a7