refactor/internal (#1216)

* refactor: update import paths in gateway handlers

* refactor: remove obsolete devtools Makefile and README

* build: optimize build process for improved efficiency

* refactor: remove obsolete pkl files related to Matrix and Sonr network configurations

* refactor: move embed code to x/dwn/types

Makefile

@@ -75,8 +75,6 @@ ldflags := $(strip $(ldflags))
 BUILD_FLAGS := -tags "$(build_tags_comma_sep)" -ldflags '$(ldflags)' -trimpath
 
 # The below include contains the tools and runsim targets.
-include contrib/devtools/Makefile
-
 all: install lint test
 
 build: go.sum