Added packages. Reformatted files.

src/hooks/slider.tsx

@@ -1,7 +1,13 @@
-import { useState, useRef, useEffect, useCallback } from "react";
+import { useCallback, useEffect, useRef, useState } from "react";
 import type { Dispatch, SetStateAction } from "react";
-import { minmax } from "../util";
+
 import type { CartesianSpace } from "../types";
+import {
+  extractEventCoordinates,
+  isLeftMouseButton,
+  isTouchEvent,
+  minmax,
+} from "../util";
 import { useScroll } from "./scroll";
 
 if (typeof TouchEvent === "undefined") {

src/hooks/tests/crosshairTest.cy.tsx

@@ -1,6 +1,7 @@
-import { useState, useRef, useEffect } from "react";
-import { useCrosshair } from "../crosshair";
+import { useEffect, useRef, useState } from "react";
+
 import type { CartesianSpace } from "../../types";
+import { useCrosshair } from "../crosshair";
 
 // Test Fixtures