Improve network usage for small text changes (#166)

frontend/sync-client/src/utils/is-binary.ts

@@ -0,0 +1,16 @@
+// Text is unlikely to contain null bytes, so we can use that to distinguish binary files.
+export function isBinary(content: Uint8Array): boolean {
+	for (const byte of content) {
+		if (byte === 0) {
+			return true;
+		}
+	}
+
+	try {
+		new TextDecoder("utf-8", { fatal: true }).decode(content);
+	} catch {
+		return true;
+	}
+
+	return false;
+}