feat: add go dependency and enhance devbox environment variables

devbox.json

@@ -1,6 +1,7 @@
 {
   "$schema": "https://raw.githubusercontent.com/jetify-com/devbox/0.12.0/.schema/devbox.schema.json",
   "packages": [
+    "go@latest",
     "bun@latest",
     "gum@latest",
     "skate@latest",
@@ -9,8 +10,9 @@
     "process-compose@latest"
   ],
   "env": {
+    "ROOT": "$(git rev-parse --show-toplevel)",
     "GOPATH": "$HOME/go",
-    "PATH": "./build:$HOME/go/bin:$PATH",
+    "GOBIN": "$GOPATH/bin",
     "CHAIN_ID": "local-1",
     "DENOM": "stake",
     "KEYRING": "test",