Create an issue template with common debugging information

[sethmlarson]

Things like:

• Truststore version
• OS variant and version
• Python version
• OpenSSL version
• verify paths
• Public URL if applicable

Maybe more?

[davisagli]

@sethmlarson how about making python -m truststore.debug print all of this out?

[sethmlarson]

@davisagli You read my mind! ✨