Allow creating JIRA issues not related to code in any JIRA project

So I’m not strongly against using JIRA issues for things not related to code, now as I mentioned in JIRA rules for architecture/design-only issue - #10 by surli IMO we should have a clear way of viewing that those tickets are not related to code so that there’s no wtf effect if we see a close ticket and don’t find related commits.

Ideally I’d probably go for a new issue type so that we use same things in old project: components are project-specific so it makes it less consistent.