Add manual build instructions for windows to readme

[bsz123]

Noticed that there were a lot of people running into the windows defender issues #61 #71 (kind of) #81 . I didn't have the time to throw together a full script but it will hopefully help out

[stupxd]

Pretty sure building locally also gets yeeted by windows defender, but also you missed a step of installing git

[bsz123]

Pretty sure building locally also gets yeeted by windows defender, but also you missed a step of installing git

Skipped the step of installing git because anyone trying this approach should already be familiar with the basics, but added to the warning.

Building locally I had no issues with defender enabled to the degree where development is usable (Because Microsoft). Part of why the release installs get blown away by both your browser and Windows is because you're installing file types that could be malicious straight from github.

[stupxd]

Building locally I had no issues with defender enabled to the degree where development is usable

Not entirely sure what would that mean exactly, I had to whitelist target folder if I wanted to build this locally. Haven't tried recently, maybe it's no longer the case