Add File Commands (#571)

* Add File Commands

* pr updates w/ feedback

* run format

* fix lint/format

* slight update with an example in the docs

* pr feedback

packages/core/src/utils.ts

@@ -0,0 +1,15 @@
+// We use any as a valid input type
+/* eslint-disable @typescript-eslint/no-explicit-any */
+
+/**
+ * Sanitizes an input into a string so it can be passed into issueCommand safely
+ * @param input input to sanitize into a string
+ */
+export function toCommandValue(input: any): string {
+  if (input === null || input === undefined) {
+    return ''
+  } else if (typeof input === 'string' || input instanceof String) {
+    return input as string
+  }
+  return JSON.stringify(input)
+}