Add battle stuff

util/UUID.gd

@@ -0,0 +1,23 @@
+static func uuidv4() -> String:
+  var random = RandomNumberGenerator.new()
+  random.randomize()
+  var bytes = PackedByteArray()
+  for i in range(16):
+    bytes.append(random.randi_range(0, 255))
+
+  # Set the version to 4 -- random
+  bytes[6] = (bytes[6] & 0x0F) | 0x40
+  # Set the variant to RFC 4122
+  bytes[8] = (bytes[8] & 0x3F) | 0x80
+
+  var hex_parts = []
+  for byte in bytes:
+    hex_parts.append(String("%02x" % byte))
+
+  return "%s%s%s%s-%s%s-%s%s-%s%s-%s%s%s%s%s%s" % [
+    hex_parts[0], hex_parts[1], hex_parts[2], hex_parts[3],
+    hex_parts[4], hex_parts[5],
+    hex_parts[6], hex_parts[7],
+    hex_parts[8], hex_parts[9],
+    hex_parts[10], hex_parts[11], hex_parts[12], hex_parts[13], hex_parts[14], hex_parts[15]
+  ]