feat: add option to show translation loading

src/lib/ChatScreens/Chat.svelte

@@ -162,6 +162,10 @@
                 }
             }
             if(translateText){
+                if (!retranslate && DBState.db.showTranslationLoading) {
+                    lastParsed = `<div class="flex justify-center items-center"><div class="animate-spin rounded-full h-8 w-8 border-b-2 border-textcolor"></div></div>`
+                }
+                
                 let doRetranslate = retranslate
                 retranslate = false
                 if(DBState.db.translatorType === 'llm' && DBState.db.translateBeforeHTMLFormatting){

src/lib/Setting/Pages/AccessibilitySettings.svelte

@@ -58,4 +58,8 @@
 
 <div class="flex items-center mt-2">
     <Check bind:check={DBState.db.bulkEnabling} name={language.bulkEnabling}/>
-</div>
+</div>
+
+<div class="flex items-center mt-2">
+    <Check bind:check={DBState.db.showTranslationLoading} name={language.showTranslationLoading}/>
+</div>