Fix avatar/banner proxy (#8346)

* Fix avatar/banner proxy

Co-authored-by: mei23 <m@m544.net>

* use getAvatarUrl

* fix

* join avatar and banner to improve performance

* join

* Update hybrid-timeline.ts

* fix

Co-authored-by: mei23 <m@m544.net>
Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>

.config/example.yml

@@ -155,6 +155,9 @@ id: 'aid'
 # Media Proxy
 #mediaProxy: https://example.com/proxy
 
+# Proxy remote files (default: false)
+#proxyRemoteFiles: true
+
 # Sign to ActivityPub GET request (default: false)
 #signToActivityPubGet: true