Implement TransitionTag

[MiniDigger]

https://streamable.com/ysh2r5

https://streamable.com/o3g0qn

      sender.sendMessage("transition:white:black:red");
      for (float phase = 0; phase <= 1; phase += 1 / 16f) {
        sender.sendMessage(MiniMessage.miniMessage().deserialize("<transition:white:black:red:" + phase + ">Hello World " + phase));
        Thread.sleep(100);
      }
      sender.sendMessage("transition:white:black:red:blue");
      for (float phase = 0; phase <= 1; phase += 1 / 16f) {
        sender.sendMessage(MiniMessage.miniMessage().deserialize("<transition:white:black:red:blue:" + phase + ">Hello World " + phase));
        Thread.sleep(100);
      }
      sender.sendMessage("- 1 transition:white:black:red");
      for (float phase = -1; phase <= 1; phase += 1 / 16f) {
        sender.sendMessage(MiniMessage.miniMessage().deserialize("<transition:white:black:red:" + phase + ">Hello World " + phase));
        Thread.sleep(100);
      }
      sender.sendMessage("- 1transition:white:black:red:blue");
      for (float phase = -1; phase <= 1; phase += 1 / 16f) {
        sender.sendMessage(MiniMessage.miniMessage().deserialize("<transition:white:black:red:blue:" + phase + ">Hello World " + phase));
        Thread.sleep(100);
      }



      for (int i = 0; i < 1000; i++) {
        final double angle = (2.0 * Math.PI * i) / 100;
        final double sin = Math.sin(angle);
        sender.sendMessage(MiniMessage.miniMessage().deserialize("<transition:white:black:red:blue:" + sin + ">Hello World " + sin));
        Thread.sleep(100);
      }

[zml2008]

blocked by #672

[kezz]

Needs a matching docs PR/issue but LGTM!

[kezz]

Would be nice in the future to abstract more of this logic out somehow. Still a lot repeated between here and the new abstract class for gradients/rainbows.

[MiniDigger]

docs pr KyoriPowered/adventure-docs#67