feat: expand user mode, add DOOM game, add manpages

kernel/src/Graphics/Cursor.cpp

@@ -162,4 +162,9 @@ namespace Graphics::Cursor {
         g_OldY = newY;
     }
 
+    uint32_t* GetFramebufferBase()   { return g_FbBase; }
+    uint64_t  GetFramebufferWidth()  { return g_FbWidth; }
+    uint64_t  GetFramebufferHeight() { return g_FbHeight; }
+    uint64_t  GetFramebufferPitch()  { return g_FbPitch; }
+
 };

kernel/src/Graphics/Cursor.hpp

@@ -13,4 +13,9 @@ namespace Graphics::Cursor {
     void Initialize(limine_framebuffer* framebuffer);
     void Update();
 
+    uint32_t* GetFramebufferBase();
+    uint64_t  GetFramebufferWidth();
+    uint64_t  GetFramebufferHeight();
+    uint64_t  GetFramebufferPitch();
+
 };