Adds a Qt and SDL2 frontend for Vulkan. It also finishes the missing
bits on Vulkan initialization.

This fixes crashes when a Vulkan device fails to initialize.

Delay buffer destruction some extra frames to avoid destroying buffers
that are still being used from older frames. This happens on Nvidia's
driver with mailbox.

This was implemented by a previous commit and it's no longer required.

Layered break downs was passing "layer" as a "depth" parameter. This
commit addresses that.

This addresses the long standing issue of compatibility vs. core
profiles on OpenGL, properly implementing depth vs. stencil sampling
depending on the texture swizzle.

- Required for Little Town Hero to boot further.

Some games like The Legend of Zelda: Breath of the Wild assign
render targets without writing them from the fragment shader. This
generates Vulkan validation errors, so silence these I previously
introduced a commit to set "vec4(0, 0, 0, 1)" for these attachments. The
problem is that this is not what games expect. This commit reverts that
change.

This should hopefully fix compilation errors.

An implementation of the cemuhook motion/touch protocol, this adds the
ability for users to connect several different devices to citra to send
direct motion and touch data to citra.

Co-Authored-By: jroweboy <jroweboy@gmail.com>

- Used by Pokemon Mystery Dungeon.

Certain newer unity games (Terraria, Pokemon Mystery Dungeon) require
that the argument region be populated. Failure to do so results in
an integer underflow in argument count, and eventually an unmapped
read at 0x800000000. Providing this default fixes this.

Note that the behavior of official software is as yet unverified,
arguments-wise.

GUI: rename and reorder themes

- Fixes timestamp in ZLA and Astral Chain saves.

- We have some important audio settings, makes them more discoverable.

This abstraction takes care of presenting accelerated and
non-accelerated or "framebuffer" images to the Vulkan swapchain.

GUI/gamelist: add "None" as an option for second row and remove dynamically duplicate row options (#3309)

* GUI/gamelist: add "None" as an option for second row and remove duplicated row options

* fix clang-format warnings

Also updates sirit to include atomic instructions.

This significantly reduces unnecessary disk writes and space usage
when building Citra.

libcore.a is now only ~1MB rather than several hundred megabytes.

This fixes template resolution considering GLboolean an integer instead
of a bool.

Front face was being forced to a certain value when cull face is
disabled. Set a default value on initialization and drop the forcefully
set front facing value with culling disabled.

This allows us to create a fastmem arena within the memory.cpp helpers.

It is currently a std::vector, however we might want to replace it with a more fancy allocator.
So we can't use the C++ iterators any more.

The information is duplicated in the brand string and the telemetry field is unused

Use Visit instead of reimplementing it. Fixes unimplemented negations
for condition codes.

This abstraction is Vulkan's equivalent to OpenGL's rasterizer. It takes
care of joining all parts of the backend and rendering accordingly on
demand.