Fixes#81758
DisplayServerWeb::process_joypads handles buttons 6 and 7 of the
HTML5 Standard Gamepad as a special case by doing:
`input->joy_axis(idx, (JoyAxis)b, s_btns[b]);`
This doesn't work because there is no JoyAxis 6 or 7 in the enum
To fix this we use JoyAxis::TRIGGER_LEFT and TRIGGER_RIGHT for button 6
and 7
However since we are now lying to input->joy_axis we also need to lie in
the mappings for the standard gamepad in godotcontrollersdb.txt,
otherwise input->joy_axis will try to find a mapping to axis 4(LT) and
axis 5(RT) that's not defined.
Therefore we set lefttrigger to +a4 and righttrigger to +a5 in the
mapping, to match what we are actually sending.
A cleaner, and more involved fix to this would be modifying
input->joy_button so that it can handle analog buttons and map them to
axes preserving their value instead of converting to boolean
The UWP platform port was never ported to the Godot 4.0+ API,
and it's now accumulating bitrot as it doesn't compile, and thus
we no longer propagate platform changes in it.
So we finally remove to acknowledge this state. There's still some
interest in reviving the UWP port eventually, especially as support
for Direct3D 12 will soon be merged, but when that happens it will
be easiest to redo it from scratch.
No longer use emscripten functions for gamepads, implement them as
library functions in library_godot_display.js instead.
This allows us to do a better job at "guessing" vendorId, productId, OS,
etc. thus allowing us to better find the remapping for the controller.
The 204 and 205 are the older, SDL 2.0.4 and 2.0.5 compatible mappings,
but since all new mappings have only been added to the main
gamecontrollerdb.txt which overrides the older entries, it doesn't make
much sense for us to keep the old databases.
We do not support the SDL2 half axes and inverted axes features from
gamecontrollerdb.txt, but this only impacts the specific controllers
which can use those features, the rest are parsed and used properly.
As for godotcontrollerdb.txt, it doesn't make sense for us to maintain
our own custom mappings instead of submitting them upstream. The only
exception is the Javascript and UWP platforms for which no bindings are
available upstream, so we keep those entries.
