feat: add readme for polywrap-client

Author: Niraj-Kamdar

packages/polywrap-client/README.md

@@ -1 +1,40 @@
-TODO
+# polywrap-client
+
+Python implementation of the polywrap client.
+
+## Usage
+
+### Configure and Instantiate
+
+Use the `polywrap-uri-resolvers` package to configure resolver and build config for the client.
+
+```python
+from polywrap_uri_resolvers import FsUriResolver, SimpleFileReader
+
+config = ClientConfig(
+    resolver=FsUriResolver(file_reader=SimpleFileReader())
+)
+
+client = PolywrapClient(config)
+```
+
+### Invoke
+
+Invoke a wrapper.
+
+```python
+uri = Uri.from_str(
+    'fs/<path to wrapper>'  # Example uses simple math wrapper
+)
+args = {
+    "arg1": "123",  # The base number
+    "obj": {
+        "prop1": "1000",  # multiply the base number by this factor
+    },
+}
+options: InvokerOptions[UriPackageOrWrapper] = InvokerOptions(
+    uri=uri, method="method", args=args, encode_result=False
+)
+result = await client.invoke(options)
+assert result == "123000"
+```