Allows using Qt provider over default.

Default implementation will return "yuzu" for any string. GUI clients (or CLI) can implement the Frontend::SoftwareKeyboardApplet class and register an instance to provide functionality.

Previously we weren't always initializing all members of the struct.
Prevents potentially wonky behavior from occurring.

Gets the class out of the global namespace.

LOG_GENERIC usages will be amended in a follow-up to keep API changes separate from
interface changes, as it will require removing a parameter from the relevant function
in the VMManager class.

* added a SidebySide Layout

* Reworked, so both screen have the same height and cleaned up screen translates.

* added the option in the UI, hope this is the right way to do it. formated framebuffer_layout.cpp

* delete the x64 files

* deleted ui_configure_graphics.h

* added Option for the Layout in the xml

* got rid of SIDE_BY_SIDE_ASPECT_RATIO because it was useless. pulled translate into variables

* changed shift variables to u32 and moved them in their respective branch. remove notr="true" for the Screen layout drop down

* reworked intends :). changed function description for SideFrameLayout

* some description reworking

video_core didn't even properly use them, and they were the source of
many otherwise-unnecessary dependencies from core to video_core.

This removes a dependency inversion between core and common. It's also
the proper place for the file since it makes screen layout decisions
specific to the 3DS.

1. removed zl, zr and c-stick from HID::PadState. They are handled by IR, not HID
2. removed button handling in EmuWindow
3. removed key_map
4. cleanup #include

Corrects a few issues with regards to Doxygen documentation, for example:

- Incorrect parameter referencing.
- Missing @param tags.
- Typos in @param tags.

and a few minor other issues.

More ergonomic to use and will be required for upcoming changes.

* Removes circular dependences (common should not depend on core)