Update GitHub issue templates

[jemarq04]

Change description

I've updated the bug report issue template for GitHub so that it now uses the form submission. I've attached an image here to show what it would look like - it's a bit more structured now and includes a comment on opening a PR or asking others for help. (The other option not shown in the bottom dropdown is "I plan on making a PR for this issue." The issue that is created will look the same as it had been previously with the markdown template.

I've also updated the contact links to remove the old slack/stackoverflow links to the new Discord server. (That being said, we may need to update the invite since we want to point the invite to the #welcome channel instead of #general).

I'm open to suggestions on these updates! If you think anything else would improve readability I can add that in.

AI coding assistance disclosure

No AI was used.

Contributor check list

• I have written a description of the contribution and explained its motivation.
• I have written tests for my code changes (if applicable).
• I have read and understood the AI Assisted Contribution guidelines.
• I will own this change in production, and I am prepared to fix any bugs caused by my code change.

[jemarq04]

Hmm. Maybe we want to add path filters to some of the CI - no need to run all of our tests a PR that only updates .github/.