Add LimitTalentsExpansion config

[liyunfan1223]

# Enable expansion limitation for talents and glyphs - ie: level <= 60 bot only uses talents
# available in vanilla, level <= 70 bot only uses talents available in TBC)
# Default: 0
AiPlayerbot.LimitTalentsExpansion = 0

Only allows the first 7 rows at level 60 (or 9 rows at level 70) and disables glyphs to approach vanilla or tbc character abilities (disable by default).