feat(subjects): created subject schema model

#11

models/subject.ts

@@ -0,0 +1,40 @@
+import mongoose from "mongoose";
+import type { Document } from "mongoose";
+
+export interface ISubject extends Document {
+  _id: string;
+  name: string;
+  lastDone: Date;
+  completedSessions: number;
+  totalSessions: number;
+}
+
+/*
+ * Either school subjects or OTHER which will not be a part of this category
+ *
+ *  - School Subject
+ *  - Other (anything other than a school subject)
+ *  - All: Retains all information of all (updated all the time)
+ * */
+export const SubjectSchema = new mongoose.Schema({
+  name: {
+    type: String,
+    required: true,
+  },
+
+  lastDone: {
+    type: Date,
+  },
+
+  completedSessions: {
+    type: Number,
+  },
+
+  totalSessions: {
+    type: Number,
+  },
+});
+
+const Subject =
+  mongoose.models.Task || mongoose.model<ISubject>("Subject", SubjectSchema);
+export default Subject;