[z2054] Add Outdoor PvP placeholders and string texts

(based on commit 269d295)

(based on commit [s1667] - 63cd226)
[z2055] Add OutdoorPvP class

(based on commit 3964df8)

Signed-off-by: Nighoo <nighoo@overninethousand.de>

(cleaned version of 8096b40)

(based on commit [s1668] - 92e548d)