Use new (YAML) issue templates #1946

For fd, we now use a new type of bug report template, which could be useful for bat as well to further reduce the amount of "bad" bug tickets (duplicates, known issues, etc.).

• https://github.com/sharkdp/fd/issues/new/choose
• https://github.com/sharkdp/fd/blob/master/.github/ISSUE_TEMPLATE/bug_report.yaml
• https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/syntax-for-issue-forms