gpu: add QueryType enum

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

gpu/src/types.zig

@@ -185,6 +185,12 @@ pub const PrimitiveTopology = enum(u32) {
     triangle_strip = 0x00000004,
 };
 
+pub const QueryType = enum(u32) {
+    occlusion = 0x00000000,
+    pipeline_statistics = 0x00000001,
+    timestamp = 0x00000002,
+};
+
 test "BackendType name" {
     try testing.expectEqualStrings("Vulkan", BackendType.vulkan.name());
 }