feat(test): add short answer input on questions

fix(test): fix navigation upon test completion

src/types/sheet.ts

@@ -6,6 +6,8 @@ interface CreatedBy {
 
 export type ExamPhase = "IDLE" | "MODULE" | "BREAK" | "FINISHED";
 
+export type QuestionType = "MCQ" | "TEXT" | "SHORT_ANSWER";
+
 export interface Subject {
   name: string;
   section: string;