Adds Bulgarian translation (#4470)

src-ui/src/app/app.module.ts

@@ -105,6 +105,7 @@ import { FileDropComponent } from './components/file-drop/file-drop.component'
 import localeAf from '@angular/common/locales/af'
 import localeAr from '@angular/common/locales/ar'
 import localeBe from '@angular/common/locales/be'
+import localeBg from '@angular/common/locales/bg'
 import localeCa from '@angular/common/locales/ca'
 import localeCs from '@angular/common/locales/cs'
 import localeDa from '@angular/common/locales/da'
@@ -133,6 +134,7 @@ import localeZh from '@angular/common/locales/zh'
 registerLocaleData(localeAf)
 registerLocaleData(localeAr)
 registerLocaleData(localeBe)
+registerLocaleData(localeBg)
 registerLocaleData(localeCa)
 registerLocaleData(localeCs)
 registerLocaleData(localeDa)

src-ui/src/app/services/settings.service.ts

@@ -174,6 +174,12 @@ export class SettingsService {
         englishName: 'Belarusian',
         dateInputFormat: 'dd.mm.yyyy',
       },
+      {
+        code: 'bg-bg',
+        name: $localize`Bulgarian`,
+        englishName: 'Bulgarian',
+        dateInputFormat: 'dd.mm.yyyy',
+      },
       {
         code: 'ca-es',
         name: $localize`Catalan`,