Add save function

lib/commands/types.tsx

@@ -1,4 +1,5 @@
 import type { CommandInterface } from ".";
+import type { Diary, Project } from "../content/types";
 
 export interface Flag {
     short: string;
@@ -19,3 +20,10 @@ export interface Command {
     subcommands?: Record<string,SubCommand>;
     execute: (flags: string[], args: string[], raw: string, cmdIf: CommandInterface) => string[];
 }
+
+export interface CommandInterfaceCallbacks {
+    setModalVisible?: (visible: boolean) => void; 
+    setModalContent?: (content: Project | Diary, selectedPage?: number) => void;
+    setModalHTML?: (html: any) => void;
+    getCmdHistory?: () => string[];
+}