Add MCXboxBroadcast tag

src/main/resources/tags/links/mcxboxbroadcast.tag

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+type: text
+aliases: minecraftxboxbroadcast, mcxb
+button: [Support Server](https://discord.gg/SDDfsuCcBX/)
+button: [Download](https://github.com/MCXboxBroadcast/Broadcaster/)
+
+---
+
+MCXboxBroadcast is tool for Geyser servers developed by <@170429173003714560>. It allows you to join a Geyser server by following or friending someone in Minecraft then joining that user.
+
+It comes as a standalone application or an extension for Geyser, support is not typically provided here, however, there exists a support server linked below.
+