Implemented CRC32-IEEE for PNG files

Update crc32.mjs, data-utils.mjs, and png-utils.mjs

static/resources/NibblePoker/libs/crc32.mjs

@@ -0,0 +1,33 @@
+
+/**
+ * @param data {Uint8Array}
+ * @param crc32 {number}
+ * @return {number}
+ */
+export function stepCrc32IEEE(data, crc32 = 0xffffffff) {
+	for (let i = 0; i < data.length; i++) {
+		crc32 ^= data[i];
+		for (let j = 0; j < 8; j++) {
+			crc32 = (crc32 >>> 1) ^ (crc32 & 1 ? 0xedb88320 : 0);
+		}
+	}
+	return crc32;
+}
+
+/**
+ * @param crc32 {number}
+ * @return {number}
+ */
+export function finishCrc32IEEE(crc32) {
+	return (crc32 ^ 0xffffffff) >>> 0;
+}
+
+/**
+ * Calculates the CRC32-IEEE for the given data
+ * @param data {Uint8Array}
+ * @param crc32 {number}
+ * @return {number} The resulting CRC32
+ */
+export function crc32IEEE(data, crc32 = 0xffffffff) {
+	return finishCrc32IEEE(stepCrc32IEEE(data, crc32));
+}