Help wanted: Add capture limit to map config

[Haxk20]

This is a very good first contributor issue for someone.

Capture limit has to be per map and thus map needs to have a capture limit
in the config.
This will require a new variable in structs.
Loading and using it should be very easy otherwise.

[lokka30]

@Haxk20, is this config layout suitable for this?

"capture-limits": {
        "default": 10,
        "Border_Hallway": 10
},

[Haxk20]

@Haxk20, is this config layout suitable for this?

"capture-limits": {
        "default": 10,
        "Border_Hallway": 10
},

This should be in map config and default specified in the macros