Add other calendar types support

[alr86]

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Checklist

• [X] I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• [X] I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• [X] I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• [X] I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• [X] This issue contains only one feature request.
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Feature description

Add support other calendar types like Solar Hijri calendar

Why do you want this feature?

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Additional information

No response

[unixasket]

I like the idea. If this is can be done, adding switch to "badi-calendar" (Bahai-calendar) was great. Also date calculating gregorian to others would be a nice feature

[yshalsager]

+1 For Hijri calendar, will be super useful for a lot of Muslim users.

[Shaco-Code]

yes please we really need it ..

[alr86]

+1 For Hijri calendar, will be super useful for a lot of Muslim users.

You can use "Persian calendar" open-source app for now

[naveensingh]

Closing in favor of this new general issue: https://github.com/FossifyOrg/General-Discussion/issues/306

EDIT: Not duplicate. General issue is follow up of https://github.com/FossifyOrg/Messages/issues/362