Add Wormhole tentacle with internal UI and transfer preferences

Makefile

@@ -5,9 +5,11 @@ export GOCACHE
 
 build:
 	go build -buildvcs=false -mod=readonly -o hello-world/bin/hello-world ./hello-world/src
+	go build -buildvcs=false -mod=readonly -o wormhole/bin/wormhole-tentacle ./wormhole/src
 
 check: build
 	go vet ./...
+	go test ./...
 	python3 -B tools/check.py
 
 package: