Update Windows Installation Methods

[Gregory-K]

• Provide .bat and .ps1 scripts
• Both append yen ($env:userprofile\.yen\bin) to USER env PATH variable.

Resolves #15

[tusharsadhwani]

This seems great! It's just that I'm on vacation and not near a Windows machine just yet, so I can't properly test the scripts.

I'll merge it as soon as I can ensure this works as I expect it to.

[Gregory-K]

Certainly! Take your time; vacations are a purposeful vacancy.

In the meanwhile, the addition of a small notice or the removal of curl -L yen.tushar.lol/install.bat | cmd in the README may prevent confusion or unforeseen issues, depending on the user's skill-set and backup options.
just a thought

[tusharsadhwani]

I'm home, I'll dust off my windows machine today, and get on this over the weekend.

Probably this and tusharsadhwani/packaged#15 I'll take care of.

[tusharsadhwani]

I'll be referencing this code for a long time, because i suck at bash and powershell. Thanks a ton!

[Gregory-K]

You're welcome! I'm glad the code will be helpful to you.