Go Docs (#413)

First draft of docs. Remaining TODO:

- Document timeouts
- Document clients
- Document testing & mocking

We also need a better story around Postgres setup—potentially a
CLI as in the other languages.

---------

Co-authored-by: maxdml <[email protected]>

Author: kraftp

docs/examples/index.md

@@ -37,7 +37,7 @@ import { VscGraphLine } from "react-icons/vsc";
     href="python/examples/widget-store"
     description="Use DBOS durable workflows to build an online storefront that's resilient to any failure."
     icon={<MdOutlineShoppingCart color="white" size={50}/>}
-    language={["python", "typescript"]}
+    language={["python", "typescript", "go"]}
   />
   <CardLink
     label="Stock Tracker"

docs/golang/examples/_category_.json

@@ -0,0 +1,5 @@
+{
+    "label": "Example Applications",
+    "position": 50
+}
+