chore: add devbox integration

.envrc-devbox

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+# Automatically sets up your devbox environment whenever you cd into this
+# directory via our direnv integration:
+
+eval "$(devbox generate direnv --print-envrc)"
+
+# check out https://www.jetpack.io/devbox/docs/ide_configuration/direnv/
+# for more details

devbox.json

@@ -0,0 +1,19 @@
+{
+  "$schema": "https://raw.githubusercontent.com/jetify-com/devbox/0.13.7/.schema/devbox.schema.json",
+  "packages": {
+    "gcc":           "latest",
+    "pkg-config":    "latest",
+    "icdiff":        "latest",
+    "stack":         "latest",
+    "cabal-install": "latest",
+    "zlib": {
+      "version": "latest",
+      "outputs": ["out", "dev"]
+    },
+    "hpack": "latest"
+  },
+  "env": {
+    "CC": "clang",
+    "LD_LIBRARY_PATH": "$DEVBOX_PACKAGES_DIR/lib:$LD_LIBRARY_PATH"
+  }
+}