added math library

src/main/java/carpet/script/CarpetScriptServer.java

@@ -45,6 +45,7 @@ public class CarpetScriptServer
         add(new BundledModule("camera", false));
         add(new BundledModule("event_test", false));
         add(new BundledModule("stats_test", false));
+        add(new BundledModule("math", true));
     }};
 
     public CarpetScriptServer()

src/main/resources/assets/carpet/scripts/math.scl

@@ -0,0 +1,3 @@
+_euclidean_sq(vec1, vec2) -> reduce(vec1 - vec2, _a + _*_, 0);
+_euclidean(vec1, vec2) -> sqrt(reduce(vec1 - vec2, _a + _*_, 0));
+_vec_length(vec) -> sqrt(reduce(vec, _a + _*_, 0));