big refactor to isolate functionality. adds milsim_fnc_log.

functions/reinsert/fn_getNearestBase.sqf

@@ -0,0 +1,10 @@
+params [["_player", objNull, [objNull]]];
+if (isNull _player) exitWith {objNull};
+
+private _bases = missionNamespace getVariable ["milsim_respawn_bases", []];
+if (count _bases == 0) exitWith {objNull};
+
+// get nearest base (Module_Respawn_F)
+private _closestBase = [_bases, _player] call BIS_fnc_nearestPosition;
+if (isNull _closestBase) exitWith {objNull};
+_closestBase;