some docs

Co-authored-by: Guy Royse <guy@guyroyse.com>

docs/command-options.md

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+# Command Options
+
+> :warning: The command options API in v5 has breaking changes from the previous version. For more details, refer to the [v4-to-v5 guide](./v4-to-v5.md#command-options).
+
+TODO: "proxy client" concept
+
+## Type Mapping
+
+TODO [RESP](./RESP.md)
+
+`withTypeMapping`
+
+```javascript
+await client.get('key'); // `string | null`
+
+const proxyClient = client.withTypeMapping({
+  [TYPES.BLOB_STRING]: Buffer
+});
+
+await proxyClient.get('key'); // `Buffer | null`
+```
+
+## Abort Signal
+
+TODO
+
+`withAbortSignal`
+
+## ASAP
+
+TODO
+
+`asap`
+
+## `withCommandOptions`
+
+TODO