refactor(HomeController): add SetLanguage and GetLanguages endpoints

EnvelopeGenerator.Web/wwwroot/js/network.js

@@ -26,7 +26,7 @@ function postEnvelope(annotations) {
 async function setLangAsync(language, flagCode) {
     document.getElementById('selectedFlag').className = 'fi ' + flagCode + ' me-2';
 
-    await fetch(`/lang/${language}`, {
+    await fetch(`/api/localization/lang/${language}`, {
         method: 'POST',
         headers: {
             'Content-Type': 'application/json'
@@ -36,7 +36,7 @@ async function setLangAsync(language, flagCode) {
 
 async function setLanguage(language) {
 
-    const hasLang = await fetch('/lang', {
+    const hasLang = await fetch('/api/localization/lang', {
         method: 'GET',
         headers: {
             'Content-Type': 'application/json'
@@ -47,7 +47,7 @@ async function setLanguage(language) {
         .catch(err => false);
 
     if (hasLang)
-        return await fetch(`/lang/${language}`, {
+        return await fetch(`/api/localization/lang/${language}`, {
             method: 'POST',
             headers: { 'Content-Type': 'application/json' }
         })