Add character: D to font: 3d-diagonal

[nakul-py]

Character : D
Font : 3d-diagonal

[issue-assigner]

@nakul-py Thank you for opening this issue. Maintainers will check and approve if seems to be useful.

[avi-dey]

@ASCII_BOT claim

[issue-assigner]

@avi-dey This issue has been successfully assigned to you! 🚀