Add common angles are permanent variables, 0, 90,180 etc (#89)

src/App.tsx

@@ -111,6 +111,26 @@ function App() {
                 },
               ],
             },
+            _0: {
+              type: 'userVal',
+              value: 0,
+              __meta: [],
+            },
+            _90: {
+              type: 'userVal',
+              value: 90,
+              __meta: [],
+            },
+            _180: {
+              type: 'userVal',
+              value: 180,
+              __meta: [],
+            },
+            _270: {
+              type: 'userVal',
+              value: 270,
+              __meta: [],
+            },
           },
           _sketch: [],
         })

src/lang/std/sketchcombos.ts

@@ -350,9 +350,12 @@ const setAngledIntersectLineForLines: TransformInfo['createNode'] =
       2
     )
     const angle = args[0].type === 'Literal' ? Number(args[0].value) : 0
+    const angleVal = [0, 90, 180, 270].includes(angle)
+      ? createIdentifier(`_${angle}`)
+      : createLiteral(angle)
     return intersectCallWrapper({
       fnName: 'angledLineThatIntersects',
-      angleVal: createLiteral(angle),
+      angleVal,
       offsetVal:
         forceValueUsedInTransform || createLiteral(valueUsedInTransform),
       intersectTag: createLiteral(referenceSegName),