Localization - First Pass (#2174)

* Started designing the backend localization service

* Worked in Transloco for initial PoC

* Worked in Transloco for initial PoC

* Translated the login screen

* translated dashboard screen

* Started work on the backend

* Fixed a logic bug

* translated edit-user screen

* Hooked up the backend for having a locale property.

* Hooked up the ability to view the available locales and switch to them.

* Made the localization service languages be derived from what's in langs/ directory.

* Fixed up localization switching

* Switched when we check for a license on UI bootstrap

* Tweaked some code

* Fixed the bug where dashboard wasn't loading and made it so language switching is working.

* Fixed a bug on dashboard with languagePath

* Converted user-scrobble-history.component.html

* Converted spoiler.component.html

* Converted review-series-modal.component.html

* Converted review-card-modal.component.html

* Updated the readme

* Translated using Weblate (English)

Currently translated at 100.0% (54 of 54 strings)

Translation: Kavita/ui
Translate-URL: https://hosted.weblate.org/projects/kavita/ui/en/

* Converted review-card.component.html

* Deleted dead component

* Converted want-to-read.component.html

* Added translation using Weblate (Korean)

* Translated using Weblate (Spanish)

Currently translated at 40.7% (22 of 54 strings)

Translation: Kavita/ui
Translate-URL: https://hosted.weblate.org/projects/kavita/ui/es/

* Translated using Weblate (Korean)

Currently translated at 62.9% (34 of 54 strings)

Translation: Kavita/ui
Translate-URL: https://hosted.weblate.org/projects/kavita/ui/ko/

* Converted user-preferences.component.html

* Translated using Weblate (Korean)

Currently translated at 92.5% (50 of 54 strings)

Translation: Kavita/ui
Translate-URL: https://hosted.weblate.org/projects/kavita/ui/ko/

* Converted user-holds.component.html

* Converted theme-manager.component.html

* Converted restriction-selector.component.html

* Converted manage-devices.component.html

* Converted edit-device.component.html

* Converted change-password.component.html

* Converted change-email.component.html

* Converted change-age-restriction.component.html

* Converted api-key.component.html

* Converted anilist-key.component.html

* Converted typeahead.component.html

* Converted user-stats-info-cards.component.html

* Converted user-stats.component.html

* Converted top-readers.component.html

* Converted some pipes and ensure translation is loaded before the app.

* Finished all but one pipe for localization

* Converted directory-picker.component.html

* Converted library-access-modal.component.html

* Converted a few components

* Converted a few components

* Converted a few components

* Converted a few components

* Converted a few components

* Merged weblate in

* ... -> … update

* Updated the readme

* Updateded all fonts to be woff2

* Cleaned up some strings to increase re-use

* Removed an old flow (that doesn't exist in backend any longer) from when we introduced emails on Kavita.

* Converted Series detail

* Lots more converted

* Lots more converted & hooked up the ability to flatten during prod build the language files.

* Lots more converted

* Lots more converted & fixed a bunch of broken pipes due to inject()

* Lots more converted

* Lots more converted

* Lots more converted & fixed some bad keys

* Lots more converted

* Fixed some bugs with admin dasbhoard nested tabs not rendering on first load due to not using onpush change detection

* Fixed up some localization errors and fixed forgot password error when the user doesn't have change password permission

* Fixed a stupid build issue again

* Started adding errors for interceptor and backend.

* Finished off manga-reader

* More translations

* Few fixes

* Fixed a bug where character tag badges weren't showing the name on chapter info

* All components are translated

* All toasts are translated

* All confirm/alerts are translated

* Trying something new for the backend

* Migrated the localization strings for the backend into a new file.

* Updated the localization service to be able to do backend localization with fallback to english.

* Cleaned up some external reviews code to reduce looping

* Localized AccountController.cs

* 60% done with controllers

* All controllers are done

* All KavitaExceptions are covered

* Some shakeout fixes

* Prep for initial merge

* Everything is done except options and basic shakeout proves response times are good. Unit tests are broken.

* Fixed up the unit tests

* All unit tests are now working

* Removed some quantifier

* I'm not sure I can support localization for some Volume/Chapter/Book strings within the codebase.

---------

Co-authored-by: Robbie Davis <robbie@therobbiedavis.com>
Co-authored-by: majora2007 <kavitareader@gmail.com>
Co-authored-by: expertjun <jtrobin@naver.com>
Co-authored-by: ThePromidius <thepromidiusyt@gmail.com>

UI/Web/package.json

@@ -5,7 +5,8 @@
     "ng": "ng",
     "start": "ng serve",
     "build": "ng build",
-    "prod": "ng build --configuration production --aot --output-hashing=all",
+    "transloco:optimize": "transloco-optimize dist/assets/langs",
+    "prod": "ng build --configuration production --aot --output-hashing=all && npm run transloco:optimize",
     "explore": "ng build --stats-json && webpack-bundle-analyzer dist/stats.json",
     "lint": "ng lint",
     "e2e": "ng e2e"
@@ -27,6 +28,11 @@
     "@iplab/ngx-file-upload": "^16.0.1",
     "@microsoft/signalr": "^7.0.9",
     "@ng-bootstrap/ng-bootstrap": "^15.1.0",
+    "@ngneat/transloco": "^4.3.0",
+    "@ngneat/transloco-locale": "^4.1.0",
+    "@ngneat/transloco-persist-lang": "^4.0.0",
+    "@ngneat/transloco-persist-translations": "^4.0.0",
+    "@ngneat/transloco-preload-langs": "^4.0.1",
     "@popperjs/core": "^2.11.7",
     "@swimlane/ngx-charts": "^20.1.2",
     "@tweenjs/tween.js": "^21.0.0",
@@ -57,6 +63,7 @@
     "@angular-eslint/template-parser": "^16.1.0",
     "@angular/cli": "^16.1.5",
     "@angular/compiler-cli": "^16.1.6",
+    "@ngneat/transloco-optimize": "^3.0.2",
     "@types/d3": "^7.4.0",
     "@types/node": "^20.4.4",
     "@typescript-eslint/eslint-plugin": "^6.1.0",