move 'env' from state to context

src/EnvContext.ts

@@ -0,0 +1,9 @@
+import { createContext } from "react";
+import { getDefaultTypeParser, module2Env, ModuleStd } from "dope2";
+
+const mkType = getDefaultTypeParser();
+export const extendedEnv = module2Env(ModuleStd.concat([
+  ["functionWith3Params", { i: i => j => k => i + j + k, t: mkType("Int->Int->Int->Int") }],
+]));
+
+export const EnvContext = createContext(extendedEnv);