Add a DBM-style range radar for party and raid members

/radar toggles it and /radar <yards> sets the range; the right-click
menu and the mouse wheel step through 5-40 yd. The map turns with
GetPlayerFacing so ahead is up, and ClassicAPI.UnitPosition places
class-colored dots (the mirrored name, since SuperWoW takes the global
with x, y, z order).

The range ring is two stacked TempPortraitAlphaMask discs: a ring-color
disc under a slightly smaller background-color one. It turns red when a
member is inside the range, and a list under the radar shows the five
nearest with their raid markers inline. Raid markers come from the
markN tokens, so marked mobs show too and a marked member shows the
marker instead of a dot.

Units behind terrain (UnitInLineOfSight, traced 4x a second) are
dimmed. Units on another floor, over 5 yd up or down and steeper than
45 degrees so hills don't count, get an arrow above or below them.
Hovering a blip shows its name, distance and both states; clicking a
blip or a list row targets it.

init/modules.xml

@@ -83,4 +83,5 @@
   <Include file="..\modules\newitem.lua"/>
   <Include file="..\modules\friendnotes.lua"/>
   <Include file="..\modules\lossofcontrol.lua"/>
+  <Include file="..\modules\radar.lua"/>
 </Ui>