clarify what AnyCell is for

Author: seefeldb

packages/api/index.ts

@@ -52,6 +52,10 @@ type IsThisArray =
   | BrandedCell<unknown>
   | BrandedCell<any>;
 
+/*
+ * IAnyCell is an interface that is used by all calls and to which the runner
+ * attaches the internal methods..
+ */
 // deno-lint-ignore no-empty-interface
 export interface IAnyCell<T> {
 }