gitadora: fix synthetic touch (mouse and api) (#867)

## Link to GitHub Issue or related Pull Request, if one exists
#0

## Description of change
Fix mouse and touch API handling for gitadora.

* hook native touch in every arena window mode (previously only using
wintouchemu for 1 windowed mode)
* publish the touch window (SMALL panel, or the main window drawing the
overlay) and only attach injection there
* route touch on the SMALL window straight through instead of the
overlay transform, and accept the mouse only there
* fix spiceapi by forcing 800x1280 touch canvas size
* run API capture before the subscreen present to fix api not showing
sub image


## Testing
Test:

gitadora 1/2/4 windowed mode, fullscreen

iidx /sdvx / popn windowed/fullscreen for regressions

src/spice2x/api/modules/touch.cpp

@@ -13,6 +13,7 @@
 #include "touch/native/inject.h"
 #include "touch/native/nativetouchhook.h"
 #include "util/utils.h"
+#include "games/gitadora/gitadora.h"
 #include "games/iidx/iidx.h"
 
 using namespace std::placeholders;
@@ -69,6 +70,10 @@ namespace api::modules {
             // pop'n music API touch surface
             native_canvas_w = 1280;
             native_canvas_h = 800;
+        } else if (games::gitadora::is_arena_model()) {
+            // GITADORA arena SMALL subscreen, either in its own window or in the overlay
+            native_canvas_w = games::gitadora::ARENA_SUBSCREEN_WIDTH;
+            native_canvas_h = games::gitadora::ARENA_SUBSCREEN_HEIGHT;
         }
 
         functions["read"] = std::bind(&Touch::read, this, _1, _2);