[Github] Adding templates for ISSUE & PRs and environment script

[Sajjon]

Partial fix of #46 + some extra goodies. This PR is a version of apple/swift-crypto#21 updated for this repo, copy pasting my description from that PR in here (we developers are a lazy bunch right?)

Upgrading ISSUE_TEMPLATE from single markdown to 4 option selection: Bug, Regression, Question, Feature Request

Motivation:

Having this template where when user presses NEW ISSUE button she has to think about what she's doing might lead to better issues submitted.

Modifications:

1. Adding a .github directory containing four different issues types.
2. Added new script ./Scripts/environment.sh which puts to together a summary of users environment and copies to pasteboard (asking first). The scripts output looks like this:

Swift version: Apple Swift version 5.2 (swiftlang-1103.0.22 clang-1103.0.22)
Target: x86_64-apple-darwin19.3.0
Unix version: Darwin Sajjode.local 19.3.0 Darwin Kernel Version 19.3.0: Thu Jan  9 20:58:23 PST 2020
 root:xnu-6153.81.5~1/RELEASE_X86_64 x86_64

macOS version: 10.15.3
Xcode-select path: '/Applications/Xcode.app/Contents/Developer
Xcode: Xcode 11.4 (Build version 11N111s)

Result:

New-Issue alternatives

Bug report

With having pasted output generated from ./Scripts/environment.sh

Feature request

[Sajjon]

TBD: Need to agree on (potential) emoji and the name

(this is what is used in Swift Crypto)

[Sajjon]

TBD: Need to agree on (potential) emoji and the name

(this is what is used in Swift Crypto)

[Sajjon]

TBD: Need to agree on (potential) emoji and the name

(this is what is used in Swift Crypto)

[Sajjon]

TBD: Need to agree on (potential) emoji and the name

(this is what is used in Swift Crypto)

[natecook1000]

Thanks for putting together this PR, @Sajjon! Just wanted to note that we're looking at these, but need to think a little more about what kind of guidance we want in each of these places.

One Q: Is it possible to have multiple PR templates?

[Sajjon]

@natecook1000 Yes, you can create multiple PR templates too

So maybe:

• PR template for bug fixes
• General improvement (typos, code structure/refactoring)
• New features
• Meta, for Github/git stuff?

[natecook1000]

@Sajjon I'd like to keep things a bit more streamlined, and had too much feedback to give here, so I added a commit. This chops it down to two issue templates, one for bugs and one for feature requests, plus a link to the discussion forums for questions, etc. Pull requests don't seem to provide the nice "chooser" interface, so I made the default one just for regular changes/fixes and added a more in-depth template for feature additions.

What do you think of these to start with? Thanks again for getting this ball rolling!

[natecook1000]

On second thought, I'm going to merge these and we can iterate on them in place.

[Sajjon]

@natecook1000 Cool! Haha what a nasty centipede emoji you found :D

The only comment is that you chose to include the environments.sh script in the repo, but currently not referred to in the template. But yeah might still be beneficial to have around, then we can ask users to give more details at a later point in a discussion, and refer them to the script.

Seems like git attributed all changes to you as well, so any/all potential bugs in the bash script will git blame to you 😛.