GrabRight and UseRight are misdocumented about VR-Only

[NarryG]

Describe the bug
The documentation states that /Input/GrabRight and /Input/UseRight are VR-Only. This is inaccurate. UseRight and GrabRight are functional in Desktop mode, but the VRChat window must be focused.

To Reproduce
Steps to reproduce the behavior:

1. Launch in Desktop Mode
2. Focus the VRChat window
3. Send /Input/UseRight and /Input/GrabRight while the VRChat window is focused
4. The inputs will fire

Expected behavior
This specific behavioral quirk should be documented until better support for grab/use for desktop mode is implemented.

Info (please complete the following information):

• Type: Desktop
• VRChat version and build : 2022.1.11p2-1171

Additional context
This definitely isn't the intended long-term functionality, but we need a way to grab/use in desktop. Since these do actually work, the documentation should reflect the behavior, even if unintentional. In my opinion, due to the complex nature of OSC, it's better to document this than leave it undocumented until an alternative that works without the window being focused is implemented.

[arafangion]

Perhaps related to #107 ?