feat: add IRC colours, without a toggle for now

utils/generateIrcColor.ts

@@ -0,0 +1,12 @@
+import xxhash from "xxhash-wasm"
+
+const { h64 } = await xxhash()
+
+export default (seed: string): string => {
+	const lightness = 50
+	
+	// this should probably be cached eventually
+	const idHash = h64(seed)
+
+	return `hsl(${idHash % 360n}, 100%, ${lightness}%)`
+}