chore: restore original directory structure (project under code-review-graph-main/)

code-review-graph-main/tests/fixtures/sample.c

@@ -0,0 +1,25 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef struct {
+    int id;
+    char name[50];
+} User;
+
+User* create_user(int id, const char* name) {
+    User* user = malloc(sizeof(User));
+    user->id = id;
+    snprintf(user->name, 50, "%s", name);
+    return user;
+}
+
+void print_user(User* user) {
+    printf("User %d: %s\n", user->id, user->name);
+}
+
+int main() {
+    User* u = create_user(1, "Alice");
+    print_user(u);
+    free(u);
+    return 0;
+}