Add temporary waypoints and /firm sendcoords

src/main/kotlin/moe/nea/firmament/events/ProcessChatEvent.kt

@@ -6,8 +6,8 @@
 
 package moe.nea.firmament.events
 
-import moe.nea.firmament.util.unformattedString
 import net.minecraft.text.Text
+import moe.nea.firmament.util.unformattedString
 
 /**
  * Behaves like [AllowChatEvent], but is triggered even when cancelled by other mods. Intended for data collection.
@@ -16,6 +16,13 @@ import net.minecraft.text.Text
 data class ProcessChatEvent(val text: Text, val wasExternallyCancelled: Boolean) : FirmamentEvent.Cancellable() {
     val unformattedString = text.unformattedString
 
+    val nameHeuristic: String? = run {
+        val firstColon = unformattedString.indexOf(':')
+        if (firstColon < 0) return@run null
+        val firstSpace = unformattedString.lastIndexOf(' ', firstColon)
+        unformattedString.substring(firstSpace + 1 until firstColon).takeIf { it.isNotEmpty() }
+    }
+
     init {
         if (wasExternallyCancelled)
             cancelled = true