refactor(server): decouple generated images from image formats (#8246)

* rename

thumbnail config

update target paths, fix tests

rename to image settings

replace legacy enum

better typing

update sql

update api

remove config option

fix

* update docs

* update other thumbnail configs in migration

* keep legacy enum for now

* fix jumbled job names

* fix jumbled job names in tests

* rename thumbhash job

* rename dto

* fix tests

* preserve order

* remove unused import

* keep old fields in dto, marked deprecated

* update sql

---------

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

mobile/openapi/README.md

@@ -277,6 +277,7 @@ Class | Method | HTTP request | Description
  - [FileReportDto](doc//FileReportDto.md)
  - [FileReportFixDto](doc//FileReportFixDto.md)
  - [FileReportItemDto](doc//FileReportItemDto.md)
+ - [ImageFormat](doc//ImageFormat.md)
  - [JobCommand](doc//JobCommand.md)
  - [JobCommandDto](doc//JobCommandDto.md)
  - [JobCountsDto](doc//JobCountsDto.md)
@@ -341,6 +342,7 @@ Class | Method | HTTP request | Description
  - [SmartSearchDto](doc//SmartSearchDto.md)
  - [SystemConfigDto](doc//SystemConfigDto.md)
  - [SystemConfigFFmpegDto](doc//SystemConfigFFmpegDto.md)
+ - [SystemConfigImageDto](doc//SystemConfigImageDto.md)
  - [SystemConfigJobDto](doc//SystemConfigJobDto.md)
  - [SystemConfigLibraryDto](doc//SystemConfigLibraryDto.md)
  - [SystemConfigLibraryScanDto](doc//SystemConfigLibraryScanDto.md)
@@ -356,7 +358,6 @@ Class | Method | HTTP request | Description
  - [SystemConfigStorageTemplateDto](doc//SystemConfigStorageTemplateDto.md)
  - [SystemConfigTemplateStorageOptionDto](doc//SystemConfigTemplateStorageOptionDto.md)
  - [SystemConfigThemeDto](doc//SystemConfigThemeDto.md)
- - [SystemConfigThumbnailDto](doc//SystemConfigThumbnailDto.md)
  - [SystemConfigTrashDto](doc//SystemConfigTrashDto.md)
  - [SystemConfigUserDto](doc//SystemConfigUserDto.md)
  - [TagResponseDto](doc//TagResponseDto.md)