refactor, add typings and comments

Closes #18 (closed)

studentbyer/components/AddRating/AddStarRating/index.tsx

@@ -2,10 +2,13 @@ import * as React from "react";
 import Icon from "react-native-vector-icons/FontAwesome5";
 import { View } from "react-native";
 
+/*
+ * Component which renders 5 clickable stars
+ */
 const AddStarRating = ({
   onPress,
   rating,
-  size
+  size,
 }: {
   onPress: (number: number) => void;
   rating: number;
@@ -14,7 +17,7 @@ const AddStarRating = ({
   const array = [1, 2, 3, 4, 5];
   return (
     <View style={{ flex: 1, flexDirection: "row" }}>
-      {array.map(number => {
+      {array.map((number) => {
         if (number <= rating) {
           return (
             <Icon