judge: add env setting

packages/hydrojudge/setting.yaml

@@ -51,4 +51,11 @@ disable:
   type: boolean
   name: disable
   desc: Disable builtin judge
-  default: false
+  default: false
+env:
+  type: text
+  name: env
+  desc: Sandbox Env
+  default: |
+    PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+    HOME=/w