Add Mintlify Docs (#196)

Author: maticzav

docs/README.md

@@ -0,0 +1,7 @@
+# Mintlify Starter Kit
+
+Run the following command at the root of your documentation (where mint.json is)
+
+```
+pnpm mintlify dev
+```

docs/_snippets/snippet-example.mdx

@@ -0,0 +1,3 @@
+## My Snippet
+
+<Info>This is an example of a reusable snippet</Info>

website/docs/advanced/cache.mdx renamed to docs/advanced/cache.mdx

@@ -18,7 +18,6 @@ SwiftGraphQL's cache works like cache in the browser - once you've queried somet
 
 Each SwiftGraphQL query contains a deterministic key that's constructed from the selection and variables.
 
-<!-- Image? -->
 
 Once a result comes in, it's indefinitely cached using this key. Therefore, if you send the same query again, we check the in-memory cache for possible existing results and use them instead.