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

crypto/keys/methods.go

@@ -1,17 +0,0 @@
-package keys
-
-type DIDMethod string
-
-const (
-	DIDMethodKey      DIDMethod = "key"
-	DIDMethodSonr     DIDMethod = "sonr"
-	DIDMehthodBitcoin DIDMethod = "btcr"
-	DIDMethodEthereum DIDMethod = "ethr"
-	DIDMethodCbor     DIDMethod = "cbor"
-	DIDMethodCID      DIDMethod = "cid"
-	DIDMethodIPFS     DIDMethod = "ipfs"
-)
-
-func (d DIDMethod) String() string {
-	return string(d)
-}