add examples/all/sdl3 for all sdl3 dependant packages

+ adds the wgpu glue packages to examples/all

examples/all/sdl3/all_sdl3.odin

@@ -0,0 +1,13 @@
+/*
+Imports all packages using SDL3, can't go in the parent directory
+because SDL2 and SDL3 will have naming conflicts.
+*/
+package all_sdl3
+
+import SDL "vendor:sdl3"
+import IMG "vendor:sdl3/image"
+import TTF "vendor:sdl3/ttf"
+
+_ :: SDL
+_ :: IMG
+_ :: TTF

examples/all/sdl3/all_sdl3_windows.odin

@@ -0,0 +1,5 @@
+package all_sdl3
+
+import wgpu_sdl3_glue "vendor:wgpu/sdl3glue"
+
+_ :: wgpu_sdl3_glue