feat(D-01): implement GaggingComponent with comprehension and range

src/main/java/com/tiedup/remake/v2/bondage/component/GaggingComponent.java

@@ -2,11 +2,42 @@ package com.tiedup.remake.v2.bondage.component;
 
 import com.google.gson.JsonObject;
 
+/**
+ * Component: gagging behavior for data-driven items.
+ *
+ * JSON config: {@code "gagging": {"comprehension": 0.2, "range": 10.0}}
+ */
 public class GaggingComponent implements IItemComponent {
 
-    private GaggingComponent() {}
+    private final double comprehension;
+    private final double range;
+
+    private GaggingComponent(double comprehension, double range) {
+        this.comprehension = comprehension;
+        this.range = range;
+    }
 
     public static IItemComponent fromJson(JsonObject config) {
-        return new GaggingComponent();
+        double comprehension = 0.2;
+        double range = 10.0;
+        if (config != null) {
+            if (config.has("comprehension")) {
+                comprehension = config.get("comprehension").getAsDouble();
+            }
+            if (config.has("range")) {
+                range = config.get("range").getAsDouble();
+            }
+        }
+        return new GaggingComponent(comprehension, range);
+    }
+
+    /** How much of the gagged speech is comprehensible (0.0 = nothing, 1.0 = full). */
+    public double getComprehension() {
+        return comprehension;
+    }
+
+    /** Maximum range in blocks where muffled speech can be heard. */
+    public double getRange() {
+        return range;
     }
 }