refactor(tree): proper filenames

src/tree/vieter_tree.c

@@ -1,5 +1,5 @@
-#include "node.h"
 #include "vieter_tree.h"
+#include "vieter_tree_node.h"
 
 struct vieter_tree {
   uint64_t size;

src/tree/vieter_tree_balancing.c

@@ -1,4 +1,4 @@
-#include "balancing.h"
+#include "vieter_tree_balancing.h"
 
 vieter_tree_node *vieter_tree_node_balance(vieter_tree_node *node) {
   vieter_tree_node *parent = node->parent;

src/tree/vieter_tree_balancing.h

@@ -1,7 +1,7 @@
 #ifndef VIETER_TREE_BALANCING
 #define VIETER_TREE_BALANCING
 
-#include "node.h"
+#include "vieter_tree_node.h"
 
 void vieter_tree_node_balance_after_insert(vieter_tree_node *node);
 

src/tree/vieter_tree_node.c

@@ -1,5 +1,5 @@
-#include "node.h"
+#include "vieter_tree_node.h"
-#include "balancing.h"
+#include "vieter_tree_balancing.h"
 
 vieter_tree_node *vieter_tree_node_init() {
   return calloc(1, sizeof(vieter_tree_node));