sokol: upgrade to latest version, add program icon support (#11559)

* updated sokol_gfx.h to the last version: 16d7b2e

* merged sokol_app and update enums.v

* added missing icons structs

* try to fixing Mac keyboard problems

* added v patch marker to sokol_app.h

* upgrade for sokol_gl.h, sokol_fontstash.h

* manage sgl_load_default_pipeline

* added load_default_pipeline() for sokol coherence

* vfmt sapp_structs.c.v

Co-authored-by: Delyan Angelov <delian66@gmail.com>

vlib/sokol/sapp/enums.v

@@ -18,6 +18,8 @@ pub enum EventType {
 	resized
 	iconified
 	restored
+	focused
+	unfocused
 	suspended
 	resumed
 	update_cursor
@@ -39,6 +41,9 @@ pub enum Modifier {
 	ctrl = 2 //(1<<1)
 	alt = 4 //(1<<2)
 	super = 8 //(1<<3)
+	lmb = 0x100
+	rmb = 0x200
+	mmb = 0x400
 }
 
 pub enum KeyCode {