Added a Red Alert 2 .map importer and terrain lighting

[Mailaender]

Thanks to @MustaphaTR and @GraionDilach.

Source of the maps:

./utility.sh --extract valley.map
./utility.sh --extract dustbowl.map
./utility.sh --extract break.map
./utility.sh --extract powdrkeg.map
./utility.sh --extract tsunami.map
./utility.sh --extract valley.map

from inside the .mix of https://xwis.net/Dl/Red-Alert-2-Multiplayer.exe

[abcdefg30]

This needs a rebase now.

[MustaphaTR]

Maps in the original game usually have overrides for lamp values, have you checked the maps here for them? Default values are too bright usually.

Edit: Oh, you did i'm blind. There's only one case of it here and it was github was hiding it by default because it is too long.

[Mailaender]

Identified more maps using http://www.cncforen.de/archive/index.php?t-6533.html reimported almost all of them and added missing overlays.

[penev92]

Realizing that if my current effort upstream to improve TS map importing (https://github.com/OpenRA/OpenRA/pull/20784) bears any fruit these maps may need to be reimported and the map importer reworked, I'm willing to merge this in the mean time in order to hopefully get things moving and because there are actual improvements to at least some of the maps here. I'll then do the rebasing of #806 and addressing style rule violations myself.