Get tests passing without engine connection (#155)

We can create a enginelessExecutor that can be used for many of the
executor tests that will be much more performant for tests that don't
need the engine to actually do any modeling work.

src/lang/std/std.test.ts

@@ -1,5 +1,5 @@
 import { abstractSyntaxTree } from '../abstractSyntaxTree'
-import { executor } from '../../lib/testHelpers'
+import { enginelessExecutor } from '../../lib/testHelpers'
 import { lexer } from '../tokeniser'
 import { initPromise } from '../rust'
 
@@ -18,9 +18,11 @@ describe('testing angledLineThatIntersects', () => {
 }, %)
 const intersect = segEndX('yo2', part001)
 show(part001)`
-    const { root } = await executor(abstractSyntaxTree(lexer(code('-1'))))
+    const { root } = await enginelessExecutor(
+      abstractSyntaxTree(lexer(code('-1')))
+    )
     expect(root.intersect.value).toBe(1 + Math.sqrt(2))
-    const { root: noOffset } = await executor(
+    const { root: noOffset } = await enginelessExecutor(
       abstractSyntaxTree(lexer(code('0')))
     )
     expect(noOffset.intersect.value).toBeCloseTo(1)