refactor: move common package to app directory

.github/deploy/devbox.json

@@ -0,0 +1,17 @@
+{
+  "$schema": "https://raw.githubusercontent.com/jetify-com/devbox/0.13.7/.schema/devbox.schema.json",
+  "packages": ["go@latest", "cargo@latest", "uv@latest", "bun@latest"],
+  "env": {
+    "PATH": "$HOME/.cargo/bin:$HOME/go/bin:$HOME/.local/bin:$HOME/.bun/bin:$PATH",
+    "GITHUB_TOKEN": "$GITHUB_TOKEN",
+    "GOPATH": "$HOME/go",
+    "GOBIN": "$GOPATH/bin",
+    "GHQ_ROOT": "$CLONEDIR"
+  },
+  "shell": {
+    "init_hook": [],
+    "scripts": {
+      "test": ["echo \"Error: no test specified\" && exit 1"]
+    }
+  }
+}