feat: add users and sessions discovery

- also add clangd multi-file intellisense

src/util.c

@@ -0,0 +1,9 @@
+#include <stdlib.h>
+#include <string.h>
+
+#include <util.h>
+
+void strcln(char **dest, const char *source) {
+  *dest = malloc(strlen(source) + sizeof(char));
+  strcpy(*dest, source);
+}