feat(web, server): Ability to use config file instead of admin UI (#3836)

* implement method to read config file

* getConfig returns config file if present

* return isConfigFile for http requests

* disable elements if config file is used, show message if config file is set, copy existing config to clipboard

* fix allowing partial configuration files

* add new env variable to docs

* fix tests

* minor refactoring, address review

* adapt config type in frontend

* remove unnecessary imports

* move config file reading to system-config repo

* add documentation

* fix code formatting in system settings page

* add validator for config file

* fix formatting in docs

* update generated files

* throw error when trying to update config. e.g. via cli or api

* switch to feature flags for isConfigFile

* refactoring

* refactor: config file

* chore: open api

* feat: always show copy/export buttons

* fix: default flags

* refactor: copy to clipboard

---------

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

server/src/domain/server-info/server-info.dto.ts

@@ -80,6 +80,7 @@ export class ServerMediaTypesResponseDto {
 }
 
 export class ServerFeaturesDto implements FeatureFlags {
+  configFile!: boolean;
   clipEncode!: boolean;
   facialRecognition!: boolean;
   sidecar!: boolean;

server/src/domain/server-info/server-info.service.spec.ts

@@ -155,6 +155,7 @@ describe(ServerInfoService.name, () => {
           search: true,
           sidecar: true,
           tagImage: true,
+          configFile: false,
         });
         expect(configMock.load).toHaveBeenCalled();
       });