feat: search by description (#15818)

* feat: search by description

* wip: mobile

* wip: mobile ui

* wip: mobile search logic

* feat: using f_unaccent

* icon to fit with text search

open-api/immich-openapi-specs.json

@@ -9949,6 +9949,9 @@
             "format": "date-time",
             "type": "string"
           },
+          "description": {
+            "type": "string"
+          },
           "deviceAssetId": {
             "type": "string"
           },

open-api/typescript-sdk/src/fetch-client.ts

@@ -769,6 +769,7 @@ export type MetadataSearchDto = {
     country?: string | null;
     createdAfter?: string;
     createdBefore?: string;
+    description?: string;
     deviceAssetId?: string;
     deviceId?: string;
     encodedVideoPath?: string;