Move components into dedicated subdirectory

This brings us a lot more tidiness.

components/uptime.c

@@ -0,0 +1,18 @@
+/* See LICENSE file for copyright and license details. */
+#include <sys/sysinfo.h>
+
+#include "../util.h"
+
+const char *
+uptime(void)
+{
+	struct sysinfo info;
+	int h = 0;
+	int m = 0;
+
+	sysinfo(&info);
+	h = info.uptime / 3600;
+	m = (info.uptime - h * 3600 ) / 60;
+
+	return bprintf("%dh %dm", h, m);
+}