save rosters in localStorage, better mobile support for 10th edition, add tailwind

src/helpers/json.js

@@ -0,0 +1,31 @@
+function replacer(key, value) {
+	if (value instanceof Map) {
+		return {
+			dataType: "Map",
+			value: Array.from(value.entries()), // or with spread: value: [...value]
+		};
+	} else if (value instanceof Set) {
+		return ["__isSet", ...value];
+	} else {
+		return value;
+	}
+}
+function reviver(key, value) {
+	if (value instanceof Array && value[0] === "__isSet") {
+		return new Set(value.slice(1));
+	}
+	if (typeof value === "object" && value !== null) {
+		if (value.dataType === "Map") {
+			return new Map(value.value);
+		}
+	}
+	return value;
+}
+
+export const parseJSON = (string) => {
+	return JSON.parse(string, reviver);
+};
+
+export const stringifyJSON = (value) => {
+	return JSON.stringify(value, replacer);
+};