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/lib/Setting/Pages/DisplaySettings.svelte

@@ -145,5 +145,9 @@
         }}/>
         <span>{language.textScreenBorder}</span>
     </div>
+{/if}
 
-{/if}
+<div class="flex items-center mt-2">
+    <Check bind:check={$DataBase.useChatCopy}/>
+    <span>{language.useChatCopy}</span>
+</div>