Setup issue templates

[uhooi]

Overview

Create .github/ISSUE_TEMPLATE/* .

References

• https://github.blog/changelog/2021-06-23-issues-forms-beta-for-public-repositories/
• https://twitter.com/kazu_pon/status/1411707332568829961?s=20
• https://twitter.com/vvakame/status/1407897362786226183?s=20
• https://github.com/cocoa-mhlw/cocoa/tree/v1.2.3/.github/ISSUE_TEMPLATE
• https://twitter.com/1024jp/status/1429354507691991040?s=20
• https://github.com/coteditor/CotEditor/blob/develop/.github/ISSUE_TEMPLATE
• https://speakerdeck.com/niw/shi-jian-ios-opunsosupuroziekutofalseshi-mefang?slide=48
• https://speakerdeck.com/niw/shi-jian-ios-opunsosupuroziekutofalseshi-mefang?slide=49
• https://github.com/twitter/TwitterTextEditor/tree/master/.github/ISSUE_TEMPLATE
• https://github.com/uber/mockolo/issues/168

[github-actions[bot]]

👋 Thanks for reporting! Please PR :)