feat(flight): add aspect ratio lift and altitude-hold trim

- Derive lift slope and induced drag from each wing's aspect ratio, found by grouping connected wing blocks across short span gaps.
- Give stabilizers and vertical wings their own parasitic drag from the stabilizerDrag config.
- Replace designSpeed with a fixed lift constant and a liftScale multiplier.
- Make auto trim hold the altitude the craft has when the pilot releases pitch, using nested altitude, climb and attitude loops.
- Add /improvedaerodynamics (alias /aero) to list, read and set the main config values in game.

src/main/java/dev/lumareth/improvedAerodynamics/Config.java

@@ -72,20 +72,26 @@ public final class Config {
 
     public static final ForgeConfigSpec.BooleanValue IMPROVED_FLIGHT_MODEL = BUILDER
             .comment("Replace Warium's lift and damping with a model based on each surface's angle of attack:",
-                    "lift grows with the square of airspeed, surfaces stall one by one when their angle of attack gets",
+                    "lift grows with the square of airspeed, the air pressure at the altitude and the wing's shape (long narrow",
+                    "wings lift better), surfaces stall one by one when their angle of attack gets",
                     "too high, and stalled surfaces stop damping rotation, which allows post-stall maneuvers with",
                     "thrust vectoring. Changes how craft fly")
             .define("improvedFlightModel", false);
 
-    public static final ForgeConfigSpec.DoubleValue DESIGN_SPEED = BUILDER
-            .comment("Improved flight model: airspeed (blocks per second) at which a level wing makes the same lift as in Warium.",
-                    "Slower flight needs a higher angle of attack, faster flight a lower one")
-            .defineInRange("designSpeed", 40.0D, 5.0D, 300.0D);
+    public static final ForgeConfigSpec.DoubleValue LIFT_SCALE = BUILDER
+            .comment("Improved flight model: multiplier for the lift of all surfaces (drag is unchanged). Raise it if a craft",
+                    "cannot stay up at the speed it should fly at, lower it for craft that climb too easily")
+            .defineInRange("liftScale", 1.0D, 0.1D, 10.0D);
 
     public static final ForgeConfigSpec.DoubleValue STALL_ANGLE_SCALE = BUILDER
             .comment("Improved flight model: multiplier for the angle of attack at which surfaces stall")
             .defineInRange("stallAngleScale", 1.0D, 0.5D, 2.0D);
 
+    public static final ForgeConfigSpec.DoubleValue STABILIZER_DRAG = BUILDER
+            .comment("Improved flight model: parasitic drag coefficient of stabilizers and vertical wings. They stabilize",
+                    "with lift, so this only costs speed. Wings use Warium's 1.0, which also stands in for fuselage drag")
+            .defineInRange("stabilizerDrag", 0.2D, 0.0D, 2.0D);
+
     public static final ForgeConfigSpec.DoubleValue TRIM_AUTHORITY = BUILDER
             .comment("Auto trim: largest pitch input (fraction of full deflection) the trim may hold")
             .defineInRange("trimAuthority", 0.5D, 0.0D, 1.0D);