Reorganize D modules a bit

src/hulk/bootinfo.d

@@ -0,0 +1,25 @@
+module hulk.bootinfo;
+
+struct BootInfo
+{
+    struct MemoryRegion
+    {
+        ulong base;
+        size_t size;
+        ubyte type;
+    }
+    struct Framebuffer
+    {
+        uint * buffer;
+        uint width;
+        uint height;
+        uint stride;
+        uint format;
+    }
+
+    Framebuffer fb;
+    MemoryRegion[800] memory_map;
+    size_t memory_map_count;
+}
+
+enum ulong HULK_VIRTUAL_START = 0x0000_4000_0000_0000u;