Copy the existing docs for exec* methods so they're accessible to users

packages/devcmd/src/process/index.ts

@@ -1,4 +1,54 @@
 import { ProcessExecutor } from "./ProcessExecutor";
 
-export const { execInTty, execPiped, execPipedParallel, execToString } = new ProcessExecutor(console);
+const DefaultProcessExecutor = new ProcessExecutor(console);
+
+/**
+ * Executes a process and throws an exception if the exit code is non-zero.
+ * Outputs (stdout/stderr) of the process are sent to our stdout/stderr.
+ *
+ * @param processInfo Information about the process to execute
+ * @returns A promise that resolves on success and rejects on error
+ *
+ * @example
+ * <caption>Running ping 127.0.0.1 on localhost</caption>
+ * ```
+ * try {
+ *   await execPiped({
+ *     command: 'ping',
+ *     args: ['127.0.0.1'],
+ *   });
+ * } catch {}
+ * ```
+ */
+export const execPiped = DefaultProcessExecutor.execPiped;
+
+/**
+ * Executes multiple processes in parallel and throws an exception if the exit code is non-zero.
+ * Outputs (stdout/stderr) of the processes are sent to our stdout/stderr. Can also take an array
+ * of {@link ProcessInfo}, since arrays are compatible with the object type indexed by integers.
+ *
+ * @param processMap A map linking process ids to {@link ProcessInfo} instances
+ * @returns A promise that resolves on success and rejects on error
+ *
+ *
+ * @example
+ * <caption>Printing node and npm version to the console</caption>
+ * ```
+ * await execPipedParallel({
+ *   nodeVersion: {
+ *     command: "node",
+ *     args: ["-v"],
+ *   },
+ *   npmVersion: {
+ *     command: "npm",
+ *     args: ["--version"],
+ *   },
+ * });
+ * ```
+ */
+export const execPipedParallel = DefaultProcessExecutor.execPipedParallel;
+
+export const execInTty = DefaultProcessExecutor.execInTty;
+export const execToString = DefaultProcessExecutor.execToString;
+
 export { ProcessExecutor, ProcessInfo } from "./ProcessExecutor";