Have the confirm on close also apply to quitting kitty

Use a dedicated API for handling quit requests on macOS rather than a
quit canary. Also create a mappable "quit" action for all platforms.

glfw/cocoa_init.m

@@ -424,11 +424,7 @@ display_reconfigured(CGDirectDisplayID display UNUSED, CGDisplayChangeSummaryFla
 - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender
 {
     (void)sender;
-    _GLFWwindow* window;
-
-    for (window = _glfw.windowListHead;  window;  window = window->next)
-        _glfwInputWindowCloseRequest(window);
-
+    if (_glfw.ns.quitRequestedCallback) _glfw.ns.quitRequestedCallback();
     return NSTerminateCancel;
 }
 
@@ -589,6 +585,12 @@ GLFWAPI GLFWapplicationwillfinishlaunchingfun glfwSetApplicationWillFinishLaunch
     return previous;
 }
 
+GLFWAPI GLFWcocoaaplicationquitrequestedfun glfwSetApplicationQuitRequestedCallback(GLFWcocoaaplicationquitrequestedfun callback) {
+    GLFWcocoaaplicationquitrequestedfun ret = _glfw.ns.quitRequestedCallback;
+    _glfw.ns.quitRequestedCallback = callback;
+    return ret;
+}
+
 int _glfwPlatformInit(void)
 {
     @autoreleasepool {

glfw/cocoa_platform.h

@@ -69,6 +69,7 @@ typedef int (* GLFWcocoatextinputfilterfun)(int,int,unsigned int, unsigned long)
 typedef bool (* GLFWapplicationshouldhandlereopenfun)(int);
 typedef void (* GLFWapplicationwillfinishlaunchingfun)(void);
 typedef bool (* GLFWcocoatogglefullscreenfun)(GLFWwindow*);
+typedef void (* GLFWcocoaaplicationquitrequestedfun)(void);
 typedef void (* GLFWcocoarenderframefun)(GLFWwindow*);
 
 typedef VkFlags VkMacOSSurfaceCreateFlagsMVK;
@@ -188,6 +189,8 @@ typedef struct _GLFWlibraryNS
     double              restoreCursorPosX, restoreCursorPosY;
     // The window whose disabled cursor mode is active
     _GLFWwindow*        disabledCursorWindow;
+    // The application quit requested callback
+    GLFWcocoaaplicationquitrequestedfun quitRequestedCallback;
 
     struct {
         CFBundleRef     bundle;

glfw/glfw.py

@@ -202,6 +202,7 @@ def generate_wrappers(glfw_header: str) -> None:
     GLFWcocoatogglefullscreenfun glfwSetCocoaToggleFullscreenIntercept(GLFWwindow *window, GLFWcocoatogglefullscreenfun callback)
     GLFWapplicationshouldhandlereopenfun glfwSetApplicationShouldHandleReopen(GLFWapplicationshouldhandlereopenfun callback)
     GLFWapplicationwillfinishlaunchingfun glfwSetApplicationWillFinishLaunching(GLFWapplicationwillfinishlaunchingfun callback)
+    GLFWcocoaaplicationquitrequestedfun glfwSetApplicationQuitRequestedCallback(GLFWcocoaaplicationquitrequestedfun callback)
     void glfwGetCocoaKeyEquivalent(int glfw_key, int glfw_mods, char* cocoa_key, size_t key_sz, int* cocoa_mods)
     void glfwCocoaRequestRenderFrame(GLFWwindow *w, GLFWcocoarenderframefun callback)
     void* glfwGetX11Display(void)
@@ -242,6 +243,7 @@ typedef int (* GLFWcocoatextinputfilterfun)(int,int,unsigned int,unsigned long);
 typedef bool (* GLFWapplicationshouldhandlereopenfun)(int);
 typedef void (* GLFWapplicationwillfinishlaunchingfun)(void);
 typedef bool (* GLFWcocoatogglefullscreenfun)(GLFWwindow*);
+typedef void (* GLFWcocoaaplicationquitrequestedfun)(void);
 typedef void (* GLFWcocoarenderframefun)(GLFWwindow*);
 typedef void (*GLFWwaylandframecallbackfunc)(unsigned long long id);
 typedef void (*GLFWDBusnotificationcreatedfun)(unsigned long long, uint32_t, void*);