mech nitrogen filtering 2 (#19868)

* target oxygen logic

* filter out nitrogen when low on oxygen

* vvrw and datafield for everything

* :trollface:

* bruh does work

* tagless chicken

* move into atmos, make it not depend on mech

* update mech prototype

---------

Co-authored-by: deltanedas <@deltanedas:kde.org>

Resources/Prototypes/Entities/Objects/Specific/Mech/mechs.yml

@@ -6,18 +6,29 @@
   - type: MobMover
   - type: Mech
   - type: MechAir
-  - type: MechAirFilter
+  - type: AirFilter
     # everything except oxygen and nitrogen
     gases:
-    - 2
-    - 3
-    - 4
-    - 5
-    - 6
-    - 7
-    - 8
-    #- 9 TODO: fusion
-  - type: MechAirIntake
+    - CarbonDioxide
+    - Plasma
+    - Tritium
+    - WaterVapor
+    - Miasma
+    - NitrousOxide
+    - Frezon
+    #- Helium3 TODO: fusion
+    # remove everything except oxygen to maintain oxygen ratio
+    overflowGases:
+    - Nitrogen
+    - CarbonDioxide
+    - Plasma
+    - Tritium
+    - WaterVapor
+    - Miasma
+    - NitrousOxide
+    - Frezon
+    #- Helium3 TODO: fusion
+  - type: AirIntake
   # for intake and filter to work
   - type: AtmosDevice
     requireAnchored: false