feat(client): gun pipper with ground impact point and radar lead marker

Draws where the shells of the first light autocannon come down and, for the
selected radar target, a lead pipper. Uses the same ballistics as Warium's
LACFireScript (muzzle speed, barrels, drag 0.99, gravity 0.05).

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YVREx3uo7nz1FEhzveWTUh

src/main/java/dev/lumareth/improvedAerodynamics/client/pipper/PipperConfig.java

@@ -0,0 +1,44 @@
+package dev.lumareth.improvedAerodynamics.client.pipper;
+
+import net.minecraftforge.common.ForgeConfigSpec;
+
+/** Client side settings of the gun pipper. Lives in improved_aerodynamics-client.toml. */
+public final class PipperConfig {
+    public static final ForgeConfigSpec SPEC;
+
+    public static final ForgeConfigSpec.BooleanValue ENABLED;
+    public static final ForgeConfigSpec.BooleanValue SHOW_IMPACT;
+    public static final ForgeConfigSpec.BooleanValue SHOW_LEAD;
+    public static final ForgeConfigSpec.BooleanValue INHERIT_SHIP_VELOCITY;
+    public static final ForgeConfigSpec.DoubleValue MUZZLE_SPEED_OVERRIDE;
+    public static final ForgeConfigSpec.DoubleValue GRAVITY;
+    public static final ForgeConfigSpec.DoubleValue DRAG;
+    public static final ForgeConfigSpec.DoubleValue MARKER_SIZE;
+
+    static {
+        ForgeConfigSpec.Builder builder = new ForgeConfigSpec.Builder();
+        builder.comment("Gun pipper for Warium light autocannons, drawn while seated in a Warium seat").push("pipper");
+        ENABLED = builder.comment("Master switch")
+                .define("enabled", true);
+        SHOW_IMPACT = builder.comment("Show where the shells of the gun come down on the ground (orange ring)")
+                .define("showImpact", true);
+        SHOW_LEAD = builder.comment("Show the lead pipper for the radar target you selected (green ring)")
+                .define("showLead", true);
+        INHERIT_SHIP_VELOCITY = builder.comment("Add the speed of your aircraft to the shells. Warium does not do this itself, only turn it",
+                        "on if a test shows your shells keep the speed of the jet (fire level at full speed, then hovering)")
+                .define("inheritShipVelocity", false);
+        MUZZLE_SPEED_OVERRIDE = builder.comment("Muzzle speed in blocks per tick, 0 works it out from the barrel length like Warium does")
+                .defineInRange("muzzleSpeedOverride", 0.0, 0.0, 100.0);
+        GRAVITY = builder.comment("Gravity of the shells in blocks per tick squared")
+                .defineInRange("gravity", 0.05, 0.0, 1.0);
+        DRAG = builder.comment("Speed the shells keep each tick, 0.99 is a vanilla arrow")
+                .defineInRange("drag", 0.99, 0.5, 1.0);
+        MARKER_SIZE = builder.comment("Radius of the markers on screen")
+                .defineInRange("markerSize", 0.03, 0.005, 0.2);
+        builder.pop();
+        SPEC = builder.build();
+    }
+
+    private PipperConfig() {
+    }
+}