feat: client/server working for adding lines, can undo locally, added a colorpicker and drawing in color is now a thing

graphical-app/src/main/java/fr/emiko/net/User.java

@@ -0,0 +1,32 @@
+package fr.emiko.net;
+
+import fr.emiko.graphicsElement.Line;
+
+import java.util.Vector;
+
+public class User {
+    private String username;
+    private String hashedPassword = "";
+    private Vector<Line> lines = new Vector<Line>();
+    private boolean connected;
+
+    public User(String username) {
+        this.username = username;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public Vector<Line> getLines() {
+        return lines;
+    }
+
+    public void setLines(Vector<Line> lines) {
+        this.lines = lines;
+    }
+}