feat: changed text copy/paste behaviour (#5786)

Co-authored-by: dwelle <luzar.david@gmail.com>
Co-authored-by: Antonio Della Fortuna <a.dellafortuna00@gmail.com>

src/components/HelpDialog.tsx

@@ -289,6 +289,10 @@ export const HelpDialog = ({ onClose }: { onClose?: () => void }) => {
               label={t("labels.paste")}
               shortcuts={[getShortcutKey("CtrlOrCmd+V")]}
             />
+            <Shortcut
+              label={t("labels.pasteAsPlaintext")}
+              shortcuts={[getShortcutKey("CtrlOrCmd+Shift+V")]}
+            />
             <Shortcut
               label={t("labels.copyAsPng")}
               shortcuts={[getShortcutKey("Shift+Alt+C")]}