Typeselect consider ifv mode

[NetsuNegi]

In vanilla game, when using type selection command on IFVs, all of them will be selected regardless of their current modes, which is allowed to customize now.

• WeaponGroupAsN determines which group the IFV is in when enabling WeaponN, where N stands for 1-based weapon mode index. IFVs in the same group will be selected together during type a selection, while not included those in different groups.
• TypeSelectUseIFVMode determines whether all IFV modes will be considered as its own group by default during a type selection.
  • If it's set to true, WeaponGroupAsN will be default to N for each WeaponN, which makes each of them become a standalone type during a type selection.
  • If it's set to false, WeaponGroupAsN will be default to 0 for all weapons, which makes type selection on IFVs work the same as before.

In rulesmd.ini:

[General]
TypeSelectUseIFVMode=false   ; boolean

[SOMEVEHICLE]                ; VehicleType
WeaponGroupAsN=              ; string, default to N if [General] -> TypeSelectUseIFVMode=true, and 0 if false

[github-actions]

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[TaranDahl]

Other things LGTM.