Add copy chat message feature in Chat panel and enable usage in 'use chat copy' setting.

- Added 'copied' string to language translation in multiple translations file.
- Added 'CopyIcon' to svelte import.
- Defined a new status message variable in Chat.svelte.
- Created a new function 'setStatusMessage' to display the current panel's state after certain action.
- Added a new setting 'useChatCopy' in 'DisplaySettings.svelte'.
- Created a checkbox with label 'useChatCopy' to toggle the Chat message copy.
- Integrated Clipboard API in Chat code to handle chat message copy via button click.

src/ts/storage/database.ts

@@ -501,7 +501,8 @@ export interface Database{
     advancedBotSettings:boolean
     useAutoSuggestions:boolean
     autoSuggestPrompt:string,
-    claudeAPIKey:string
+    claudeAPIKey:string,
+    useChatCopy:boolean,
 }
 
 interface hordeConfig{