[FEATURE] Moderators can block low-reputation accounts

[CoralineAda]

All contributions, including pull requests, issues, and comments, are governed by our code of conduct.

Is your feature request related to a problem? Please describe.

Moderators may want to prevent low-reputation accounts from opening issues.

Desired solution

Give moderators a control to prevent low-reputation accounts from opening issues.

Additional context

Prerequisite: #55