Documentation Update: Add linux ssh guide

[e-dong]

Description

Added a guide to setup remote SSH into host to startup X server and sunshine without physical login to host and dummy plug. Note this guide is specific to Xorg and NVidida GPUs.

Screenshot

Issues Fixed or Closed

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Dependency update (updates to dependencies)
• Documentation update (changes to documentation)
• Repository update (changes to repository files, e.g. .github/...)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the in code docstring/documentation-blocks for new or existing methods/components

Branch Updates

LizardByte requires that branches be up-to-date before merging. This means that after any PR is merged, this branch
must be updated before it can be merged. You must also
Allow edits from maintainers.

• I want maintainers to keep my branch updated

[CLAassistant]

All committers have signed the CLA.

[ReenigneArcher]

I know this is draft, so consider this a preliminary review.

No need to create an issue. It's an optional field in the PR template.

Otherwise, looking forward to seeing what you come up with to help us improve our docs! Some things could definitely be organized better.

[e-dong]

@ReenigneArcher I fixed a bug..when the SSH session exited / timeout, pulseaudio would be killed, resulting in no more sound. The solution was to disable PAM handlng of the SSH session.

[e-dong]

@ReenigneArcher - Feel free to continue to make reviews / comments. I greatly appreciate any feedback!

What I'm working on:

• Static IP Address for Host can use more detail
• Restructure the Uinput Permissions Workaround section, the script section makes it confusing. Instead I will put an order list of instructions relevant to updating the uinput permissions (E.g edit sudo config, create script that updates uinput permission, etc)
• "Putting Everything Together" section can be more explicit, maybe something like Host entry point for streaming
• Add a checkpoint section to make sure the user's setup is working so far in the guide. Probably before the ssh client script.
• Add a note that the ssh client script is optional, just does some nice checking if X server / Sunshine is already running, and polling the server until ssh is ready after host is booting up.
• Add a section on creating a custom resolution on the host (Good for streaming to a non standard device like MAC / iPAD) I will do this as a separate thing to do later. I can improve upon the changing resolution section in app examples.
• Replace ssh info in about/usage: Start Sunshine over SSH (Linux/X11) with link to my guide.