feat: Vector for behavior context

packages/behavior/context/index.js

@@ -1,6 +1,7 @@
 import D from 'debug';
 
 import {fastApply} from '@avocado/core';
+import {Vector} from '@avocado/math';
 
 import {Globals} from './globals';
 import {TraversalCompiler} from './traversal-compiler';
@@ -19,6 +20,7 @@ class Context extends Map {
     super.clear();
     this.add('context', this);
     this.add('global', new Globals());
+    this.add('Vector', Vector);
   }
 
   compile(traversal) {