require vvulkan 1.4

[koubaa]

Benefits:

Extension	Benefit for Goldy
VK_KHR_push_descriptor	Core push descriptors - aligns with "no descriptor sets" goal
VK_KHR_dynamic_rendering_local_read	Read from attachments in dynamic rendering
VK_KHR_maintenance5/6	API cleanup, better defaults
VK_KHR_map_memory2	Safer, simpler memory mapping
VK_EXT_pipeline_robustness	Bounds checking without extension negotiation
VK_KHR_index_type_uint8	Smaller index buffers

Core:
Guaranteed 8K rendering, 256-byte push constants minimum, all graphics/compute queues include transfer.