feat: 添加按键绑定功能

src/core/action.c

@@ -0,0 +1,23 @@
+#include "core/action.h"
+
+#include <paths.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "base/log.h"
+
+void spawn(const char *command) {
+  if (fork() == 0) {
+    setsid();
+
+    if (fork() == 0) {
+      execl(_PATH_BSHELL, _PATH_BSHELL, "-c", command, nullptr);
+      fatal("execl fail: %s", command);
+    }
+
+    exit(0);
+  }
+
+  wait(0);
+}