improve required message

src/errors.ts

@@ -3,7 +3,11 @@ export class RequiredError extends Error {
   cmdName!: string
 
   constructor(fieldName: string, cmdName: string) {
-    super(`${fieldName} is required, but was not defined` + (cmdName !== "all" ? ` for ${cmdName}` : ""))
+    super(
+      `Option: \`${fieldName}\` is required${
+        cmdName !== "all" ? ` for command: \`${cmdName}\`` : ""
+      }, but was not defined. Try using: \`--${fieldName} {value}\``
+    )
     this.fieldName = fieldName
     this.cmdName = cmdName
   }