[New Feature] Gain EXP when Healing/Repairing

[deathreaperz]

Description:

Healing/Repairing an unit/infantry won't get Experience, thus it will be good if we can make it to get experience. (To get Veteran/EliteAbilities, EliteWeapons)

Possible Implementation:

[FV]
Experience.FromEachHealing=10% (percentage, def 0%)
; If we can get exp based on the **each destroyed** target's cost, then the repair/heal exp will be obtained by **each healing** based on target's cost.

[amr-el-sayed]

I hope the same for the units like dogs, terror drones, mechanics, repair vehicles etc.