Move beacon state endpoints to a separate module. (#8529)

Part of the http api refactor to move endpoint handlers to separate modules.

This should improve code maintainability, incremental compilation time and rust analyzer performance.


  


Co-Authored-By: Jimmy Chen <jchen.tc@gmail.com>

beacon_node/http_api/src/utils.rs

@@ -0,0 +1,3 @@
+use warp::filters::BoxedFilter;
+
+pub type ResponseFilter = BoxedFilter<(warp::reply::Response,)>;