actually add vendor folder

vendor/raylib-cpp/examples/multiple/Player.cpp

@@ -0,0 +1,31 @@
+#include "Player.hpp"
+#include "raylib-cpp.hpp"
+
+Player::Player() {
+    position = Rectangle{
+        GetScreenWidth() / 2.0f - 50,
+        GetScreenHeight() / 2.0f - 50,
+        100,
+        100
+    };
+    speed = 3;
+}
+
+void Player::Draw() {
+    position.Draw(RED);
+}
+
+void Player::Update() {
+    if (IsKeyDown(KEY_UP)) {
+        position.y -= speed;
+    }
+    if (IsKeyDown(KEY_DOWN)) {
+        position.y += speed;
+    }
+    if (IsKeyDown(KEY_RIGHT)) {
+        position.x += speed;
+    }
+    if (IsKeyDown(KEY_LEFT)) {
+        position.x -= speed;
+    }
+}

vendor/raylib-cpp/examples/multiple/Player.hpp

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+#include "raylib-cpp.hpp"
+
+class Player {
+    public:
+    Player();
+    raylib::Rectangle position;
+    int speed;
+    void Draw();
+    void Update();
+};

vendor/raylib-cpp/examples/multiple/README.md

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+# Multiple Files Example
+
+This provides an example of including raylib-cpp.hpp in multiple files.

vendor/raylib-cpp/examples/multiple/main.cpp

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+/*******************************************************************************************
+*
+*   raylib-cpp [multiple] example - Includes raylib-cpp.hpp from multiple sources.
+*
+*   Welcome to raylib!
+*
+*   To test examples, just press F6 and execute raylib_compile_execute script
+*   Note that compiled executable is placed in the same folder as .c file
+*
+*   You can find all basic examples on C:\raylib\raylib\examples folder or
+*   raylib official webpage: www.raylib.com
+*
+*   Enjoy using raylib. :)
+*
+*   This example has been created using raylib-cpp
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2021 Rob Loach (https://robloach.net)
+*
+********************************************************************************************/
+
+#include "Player.hpp"
+#include "raylib-cpp.hpp"
+
+int main() {
+    raylib::Window window(640, 480, "raylib-cpp [multiple] example");
+    SetTargetFPS(60);
+
+    Player player;
+    while (!window.ShouldClose()) {
+        window.BeginDrawing();
+        {
+            window.ClearBackground(SKYBLUE);
+            player.Update();
+            player.Draw();
+        }
+        window.EndDrawing();
+    }
+}