docs: add example with args-tokenizer (#43)

As suggested in #42
added example to [args-tokenizer](https://github.com/TrySound/args-tokenizer)
for parsing command and argument from strings.

Author: TrySound

README.md

@@ -124,6 +124,23 @@ proc.aborted; // true
 proc.killed; // true
 ```
 
+### Using with command strings
+
+If you need to continue supporting commands as strings (e.g. "command arg0 arg1"),
+you can use [args-tokenizer](https://github.com/TrySound/args-tokenizer),
+a lightweight library for parsing shell command strings into an array.
+
+```ts
+import {x} from 'tinyexec';
+import {tokenizeArgs} from 'args-tokenizer';
+
+const commandString = 'echo "Hello, World!"';
+const [command, ...args] = tokenize(commandString);
+const result = await x(command, args);
+
+result.stdout; // Hello, World!
+```
+
 ## API
 
 Calling `x(command[, args])` returns an awaitable `Result` which has the