Add initial axis input proposal draft (#2415)

* Add initial axis input proposal draft

* Update documentation/proposals/Proposal - Axis Input Devices.md

Co-authored-by: Dylan Perks <11160611+Perksey@users.noreply.github.com>

* Update documentation/proposals/Proposal - Axis Input Devices.md

Co-authored-by: Dylan Perks <11160611+Perksey@users.noreply.github.com>

* further document `AxisTrait`

* Add additional comment

* improved phrasing for extension method suggestion

Co-authored-by: Dylan Perks <11160611+Perksey@users.noreply.github.com>

* Move description, status, and IsVirtual properties into IInputDevice

* Add feature to AxisGroupType.Position1D and request for feedback to AxisGroupType.Position2D and 3D

* Remove request for feedback

this feedback was more-or-less answered by myself in the axis group priority section. if we need or would like to provide anything more specific, it could be an extension method

* mark AxisDescription params as `in`

* Push validation of IAxisDevice to the InputContext

* Update input context validation description

ty perksey :)

Co-authored-by: Dylan Perks <11160611+Perksey@users.noreply.github.com>

* update validation method declaration

* Add flags for "dynamic" axes and axis groups

* Update axis update method with a struct and add "dynamic" axis handling

* add IAxisDevice.Outputs draft to the proposal

* correct axis group example

* update OutputDescription constructors

* change IsActive to AxisDescription.IsAvailable

* remove type information from OutputDescription

* add output groups

* address some feedback points

* improve enums according to feedback (and then some)

* formatting

* update OutputGroupType to be consistent with previous changes

* add note re: the removal of Outputs api from consideration for this proposal

* Rename proposal to WIP

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Co-authored-by: Dylan Perks <11160611+Perksey@users.noreply.github.com>
Co-authored-by: Dylan Perks <dylan@perksey.com>

Author: domportera