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

internal/crypto/ucan/attns/init.pkl.go

@@ -0,0 +1,8 @@
+// Code generated from Pkl module `sonr.orm.UCAN`. DO NOT EDIT.
+package attns
+
+import "github.com/apple/pkl-go/pkl"
+
+func init() {
+	pkl.RegisterMapping("sonr.orm.UCAN", UCAN{})
+}