Feat: bank / pattern import / export feature + documentation

src/input/modal.rs

@@ -638,6 +638,9 @@ fn execute_confirm(ctx: &mut InputContext, action: &ConfirmAction) -> InputResul
         ConfirmAction::ResetBanks { banks } => {
             ctx.dispatch(AppCommand::ResetBanks { banks: banks.clone() });
         }
+        ConfirmAction::ImportBank { bank } => {
+            ctx.dispatch(AppCommand::ImportBank { bank: *bank });
+        }
     }
     ctx.dispatch(AppCommand::CloseModal);
     InputResult::Continue