gpu: centralize TextureUsage -> enums.zig

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

gpu/src/enums.zig

@@ -128,6 +128,16 @@ pub const TextureFormat = enum(u32) {
     r8bg8biplanar420_unorm = 0x00000060,
 };
 
+pub const TextureUsage = enum(u32) {
+    none = 0x00000000,
+    copy_src = 0x00000001,
+    copy_dst = 0x00000002,
+    texture_binding = 0x00000004,
+    storage_binding = 0x00000008,
+    render_attachment = 0x00000010,
+    present = 0x00000020,
+};
+
 test "name" {
     try std.testing.expect(std.mem.eql(u8, @tagName(Feature.timestamp_query), "timestamp_query"));
 }