Rework LibGroupTalents now also returns function returns additionally, add Spec Role triggers to load/generic/bt2, fix WeakAuras.GetRegion

- **WeakAuras.SpecForUnit(unit)** = Returns: `classFileName..spec`, `Dominant Tree`, `spent1`, `spent2`, `spent3`
- **WeakAuras.GetUnitRole(unit)** = Returns one of: `"melee"`, `"caster"`, `"healer"`, `"tank"`
- **WeakAuras.SpecRolePositionForUnit(unit)** = Returns: `Dominant Tree`, `spent1`, `spent2`, `spent3`
- **WeakAuras.CheckTalentForUnit(unit, talentId)** = Returns: `"Points spent"` in talent or `nil`
- **WeakAuras.CheckGlyphForUnit(unit, glyphId)** = Returns: `true` if the player has the glyph associated with `spellID` or `spellName`, we can only see the glyphs of players running `LibGroupTalents-1.0`

WeakAuras/Compatibility.lua

@@ -115,6 +115,22 @@ RAID_CLASS_COLORS.SHAMAN.colorStr = "ff0070de"
 RAID_CLASS_COLORS.WARRIOR.colorStr = "ffc79c6e"
 RAID_CLASS_COLORS.DEATHKNIGHT.colorStr = "ffc41f3b"
 
+function CreateTextureMarkup(file, fileWidth, fileHeight, width, height, left, right, top, bottom, xOffset, yOffset)
+	return ("|T%s:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d|t"):format(
+		  file
+		, height
+		, width
+		, xOffset or 0
+		, yOffset or 0
+		, fileWidth
+		, fileHeight
+		, left * fileWidth
+		, right * fileWidth
+		, top * fileHeight
+		, bottom * fileHeight
+	);
+end
+
 function Clamp(value, min, max)
 	if value > max then
 		return max;