docs: Update project status and how-to guides

- Marked 3D renderer integration and procedural asset tasks as complete in PROJECT_CONTEXT.md.
- Added a new 'Platform & Windowing' section to document the major refactoring, high-DPI fix, and custom resolution feature.
- Updated HOWTO.md to include instructions for the new '--resolution' command-line option.

1 files changed, 5 insertions, 0 deletions

diff --git a/HOWTO.md b/HOWTO.md
index 4a596db..e97380e 100644
--- a/HOWTO.md
+++ b/HOWTO.md
@@ -19,6 +19,11 @@ cmake --build build
 ./build/demo64k --fullscreen
 ```
 
+To run in a specific resolution, use the `--resolution` option:
+```bash
+./build/demo64k --resolution 1024x768
+```
+
 Keyboard Controls:
 *   `Esc`: Exit the demo.
 *   `F`: Toggle fullscreen mode.