Breathing - Add Stamina Condition for Chemical Masks (#702)

**When merged this pull request will:**
- Adds stamina condition for chemical masks
- Add setting to disable condition

### IMPORTANT

- [Development Guidelines](https://ace3.acemod.org/wiki/development/)
are read, understood and applied.
- Title of this PR uses our standard template `Component -
Add|Fix|Improve|Change|Make|Remove {changes}`.

---------

Co-authored-by: MiszczuZPolski <71414303+MiszczuZPolski@users.noreply.github.com>

addons/breathing/functions/fnc_handleBreathingConditions.sqf

@@ -40,4 +40,17 @@ params ["_unit"];
             ["kat_LSDF"] call ACEFUNC(advanced_fatigue,removeDutyFactor);
         };
     };
+
+    if (EGVAR(chemical,maskStaminaLoss)) then {
+        if (goggles _target in (missionNamespace getVariable [QGVAR(availGasmaskList), []])) then {
+            if (ACEGVAR(advanced_fatigue,enabled)) then {
+                ["kat_CMSK", 1.5] call ACEFUNC(advanced_fatigue,addDutyFactor);
+            } else {
+                _unit setStamina(getStamina _unit - 3);
+            };
+        } else {
+                ["kat_CMSK"] call ACEFUNC(advanced_fatigue,removeDutyFactor);
+        };
+    };
+
 }, 10, [_unit]] call CBA_fnc_addPerFrameHandler;

addons/chemical/XEH_preInit.sqf

@@ -45,6 +45,16 @@ PREP_RECOMPILE_END;
     false
 ] call CBA_Settings_fnc_init;
 
+// Should gas mask affect stamina
+[
+    QGVAR(maskStaminaLoss),
+    "CHECKBOX",
+    [LLSTRING(SETTING_gasMaskStaminaLoss)],
+    CBA_SETTINGS_CHEM,
+    [false],
+    true
+] call CBA_Settings_fnc_init;
+
 // Chance of weapon drop by tear gas
 [
     QGVAR(tearGasDropChance),

addons/chemical/stringtable.xml

@@ -920,5 +920,8 @@
             <Chinesesimp>确定在催泪瓦斯中投掷武器的几率</Chinesesimp>
             <German>Bestimmt die Wahrscheinlichkeit, die Waffe zu verlieren, während man unter dem Einfluss von Tränengas steht</German>
         </Key>
+        <Key ID="STR_KAT_Chemical_SETTING_gasMaskStaminaLoss">
+            <English>Enable Stamina Loss when using Gas Mask</English>
+        </Key>
     </Package>
 </Project>