Add wayland-direct window mode

For testing DRM leasing on Wayland with a VR headset

window: direct: Fix formatting. Don't comment print.

Revert display resolutions change

vikTextOverlay: Use correct layout in attachement descriptor.

Fixes validation warning and bug on Wayland and modern Intel.

vikTextOverlay: Use correct layout in descriptor.

Fixes validation warning.

vikWindowWayland: Use initialize display and mode when not set.

vikLog: Add depth formats.

Fix -Wsign-compare.

fonts: Silence warnings in font.

cmake: Enable and blacklist all clang warnings. Remove gcc extra warnings.

cmake: Make vitamin-k a INTERFACE, since it's header-only.

Fix -Wnon-virtual-dtor.

vikRenderer: move TextOverlay include where it's needed. Fixes warning.

vikWindow: Use empty function initializers, fixes unused warnings.

xrgears: Fix virtual destructor warning.

xrgears: Handle sigint.

vik: Use struct and array initializers.

Remove vikInitializers.

xrgears: Use struct initializers.

triangle: Use struct initializers.

cube: Use struct initializers.