added names to nodes: made node creator functional (you can type node name), added node name display when hovering

src/graph/graph.py

@@ -9,8 +9,8 @@ class Graph:
         self.edges: list[Edge] = []
         self.nodes: list[Node] = []
 
-    def add_node(self, x: int, y: int) -> None:
-        self.nodes.append(Node(x, y, "NO NAME"))
+    def add_node(self, x: int, y: int, name: str) -> None:
+        self.nodes.append(Node(x, y, name))
 
     def add_edge(self, start_index: int, end_index: int, length: float) -> None:
         self.edges.append(Edge(start_index, end_index, length))