Added a new module called Level for level testing

src/interfaces/exam.ts

@@ -1,6 +1,6 @@
 import {Module} from ".";
 
-export type Exam = ReadingExam | ListeningExam | WritingExam | SpeakingExam;
+export type Exam = ReadingExam | ListeningExam | WritingExam | SpeakingExam | LevelExam;
 
 export interface ReadingExam {
 	parts: {
@@ -17,6 +17,14 @@ export interface ReadingExam {
 	isDiagnostic: boolean;
 }
 
+export interface LevelExam {
+	module: "level";
+	id: string;
+	exercises: Exercise[];
+	minTimer: number;
+	isDiagnostic: boolean;
+}
+
 export interface ListeningExam {
 	parts: {
 		audio: {

src/interfaces/index.ts

@@ -1 +1 @@
-export type Module = "reading" | "listening" | "writing" | "speaking";
+export type Module = "reading" | "listening" | "writing" | "speaking" | "level";