Added vote route in backend

backend/src/models/vote.model.js

@@ -0,0 +1,23 @@
+import mongoose, { Schema } from "mongoose";
+
+const voteSchema = new Schema({
+    pollId : {
+        type : Schema.Types.ObjectId,
+        ref : "Poll",
+        required : true
+    },
+    userId : {
+        type : Schema.Types.ObjectId,
+        ref : "User",
+        required : true
+    },
+    optionId : {
+        type : Schema.Types.ObjectId,
+        ref : "Option",
+        required : true
+    },
+}, {timestamps : true});
+
+
+const VoteModel = mongoose.model("Vote", voteSchema);
+export default VoteModel;