Add date/time input module

[aaronjamt]

What's new

• Adds a new GUI input module to input a date and time

Verification

• Use this module in an app

Checklist (For Reviewer)

• [ ] PR has description of feature/bug or link to Confluence/Jira task
• [ ] Description contains actions to verify feature/bugfix
• [ ] I've built this code, uploaded it to the device and verified feature/bugfix

[aaronjamt]

Thank you, looks and works really nice - however, we have a system setting for time format, 12/24hours. I think it would be reasonable for the date+time input module to respect the system's configuration. Could you please also implement that?

Also, please update API symbols for f18 too (build with ./fbt TARGET_HW=18)

Should be good now! ~~I'm not sure I like how the 12-hour mode displays, but I'm probably being too nitpicky. I'll see if I can improve it before you review it next, if not then I'll leave it.~~

Edit: Fixed it, LGTM!