core: do not trigger shell in raw mode

packages/hydrooj/package.json

@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "3.8.5",
+    "version": "3.8.6",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",

packages/hydrooj/src/ui.ts

@@ -45,6 +45,7 @@ async function executeCommand(input: string) {
         if (input === 'exit' || input === 'quit' || input === 'shutdown') {
             return process.kill(process.pid, 'SIGINT');
         }
+        if (process.stdin.isRaw) return false;
         try {
             // eslint-disable-next-line no-eval
             shell.info(await eval(input));