[Feature] Persian Calendar support

I have searched the existing feature requests, both open and closed, to make sure this is not a duplicate request. • Yes The feature In Iran, the reference date used in daily life is "Persian Calendar", which has different year start/end and months. When sorting my photos, (It's now 75,000 of them), It's a big workload to convert their dates and organize them. Good news: Gregorian/Persian dates can easily and reliably convert to each other with a very simple function/method (And good libraries and open source codes are already widely available on internet). An option to use Persian calendar (of course: only during display, even only web display will be good enough) will be extremely helpful. I don't know node.js and immich's project structure, but I'm a Java/Cdev myself. If the feature is approved, I can try to coordinate with your devs to provide and test the conversion functions Platform • Server • Web &…