Add maintenance notice

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -1,5 +1,5 @@
-name: Feature request
-description: Request a feature to be added to Feishin 🎉
+name: Feature request - NOT ACCEPTING NEW FEATURE REQUESTS
+description: Feature requests are currently closed. The application is actively being rewritten https://github.com/audioling/audioling.
 labels: ['enhancement']
 body:
     - type: textarea
@@ -18,5 +18,3 @@ body:
           options:
               - label: 'Yes'
                 required: false
-      validations:
-          required: false

README.md

@@ -27,6 +27,16 @@
     </a>
   </p>
 
+---
+
+## MAINTENANCE NOTICE
+
+Feishin is currently undergoing a major rewrite. New feature requests will not be accepted. The rewrite is being actively developed at the [audioling](https://github.com/audioling/audioling) repository.
+
+Follow the repository or join the discord/matrix server for updates.
+
+---
+
 Rewrite of [Sonixd](https://github.com/jeffvli/sonixd).
 
 ## Features