Add functionality to GUIMain to pull the readme from a specified URL in the mod.

[flpydsk]

allow readmes to be held in a git repo and read from ingame

[flpydsk]

I have things working the way I want. Had issues with async briefly where it would load the readme several times , but that is solved now so its merged back in to the netreadme branch.

[flpydsk]

Current:

• Loads Readme from URL defined in Mod.ReadmeURL
• Option in pulsar mod loader settings to auto pull the readme when you open the mod page
• stores in KV by mod name
  To Do:
• save/cache readme and only update on mod version change/manual reload.

[flpydsk]

This can pull a readme from a file in a url or from a file inside a zip with the same name as the mod.Name using mod.ReadmeURL => "file://readme.md"
mod.ReadmeURL => "https://example.com/readme.md"
All readmes are either loaded by pressing the readme buttion or on open of the mod page, no data is loaded prior to the user requesting it

[Nagord]

Seems functional enough, although the new thread feels like it could be handled better.

Examining how readme pulls are made, we can add some extra safety. Right now, a new thread will be created every frame for as long as PMLConfig.AutoPullReadme is true and the readme text is false. I recommend creating a Boolean for whether a readme pull was requested and checking for that before creating a thread.

Additionally, if the button to load the readme is called, it'll display a label for 1 frame. The label will then disappear until the button is pushed again.

[flpydsk]

Given the discussion Ill make some changes

• dict
• ill move the threading inside the running check, so it does not even start a thread.
• ill also add some bounding around the unzipping
  also the label only displays for one frame because the unzipping is quick and there is no special case for the button

[flpydsk]

Thread is now only called if Readme is empty and its not locked.
The dict is checked each frame when mod page is open, however its probably fine the way it is and caching the last mod and last readme seems overkill just to reduce the overhead for only when you are viewing the readme.
limit max file sizes for zipmods and for readmes
Moved to single dict
Added options to the GUI per below

[Nagord]

Looks fine.