Add support for RGB colors using the color char

Examples include:
`&x00002a00002b&lText`

bukkit/src/test/java/com/github/games647/fastlogin/bukkit/FastLoginBukkitTest.java

@@ -0,0 +1,27 @@
+package com.github.games647.fastlogin.bukkit;
+
+import com.github.games647.fastlogin.core.CommonUtil;
+
+import net.md_5.bungee.api.chat.TextComponent;
+import net.md_5.bungee.chat.ComponentSerializer;
+
+import junit.framework.TestCase;
+import org.junit.Test;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+public class FastLoginBukkitTest extends TestCase {
+
+    @Test
+    public void testRGB() {
+        var message = "&x00002a00002b&lText";
+        var msg = CommonUtil.translateColorCodes(message);
+        assertThat(msg, is("§x00002a00002b§lText"));
+
+        var components = TextComponent.fromLegacyText(msg);
+        var expected = """
+            {"bold":true,"color":"#00a00b","text":"Text"}""";
+        assertThat(ComponentSerializer.toString(components), is(expected));
+    }
+}