docs: add fast api example (#9418)

# Which Problems Are Solved

The community implemented an example for integrating fastAPI with
Zitadel.
So far this example has not been listed.

# How the Problems Are Solved

The example is now listed
Disclaimer is added, that some of the examples are not maintained by us

docs/docs/sdk-examples/introduction.mdx

@@ -9,6 +9,14 @@ To achieve your goals as fast as possible, we provide you with SDKs, Example Rep
 
 The SDKs and integration depend on the framework and language you are using.
 
+:::note
+In addition to our officially maintained examples, we also list community-contributed implementations.
+These examples are provided by external developers and are not maintained by us.
+While we believe they can be valuable resources and showcase diverse approaches, we cannot guarantee their completeness, functionality, or continued support.
+If you encounter issues with a community-contributed example, please contact the respective maintainers directly.
+We provide this list for informational purposes and to foster community engagement, but we do not assume responsibility for these external implementations.
+:::
+
 import { Frameworks } from "../../src/components/frameworks";
 
 ## Resources

docs/frameworks.json

@@ -80,6 +80,12 @@
     "docsLink": "https://github.com/maennchen/zitadel_api",
     "external": true
   },
+  {
+    "title": "FastAPI",
+    "imgSrcDark": "/docs/img/tech/fastapi.svg",
+    "docsLink": "https://github.com/cleanenergyexchange/fastapi-zitadel-auth",
+    "external": true
+  },
   {
     "title": "NextAuth",
     "imgSrcDark": "/docs/img/tech/nextjs.svg",

docs/sidebars.js

@@ -68,6 +68,11 @@ module.exports = {
           label: "Elixir",
           href: "https://github.com/maennchen/zitadel_api",
         },
+        {
+          type: "link",
+          label: "FastAPI",
+          href: "https://github.com/cleanenergyexchange/fastapi-zitadel-auth",
+        },
         {
           type: "link",
           label: "NextAuth",

docs/static/img/tech/fastapi.svg

@@ -0,0 +1 @@
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