Ability to select First day of week / Support macOS First day of week setting

[alexeypegov]

Is your feature request related to a problem? Please describe.
No

Describe the solution you'd like
I wish to be able either to use system setting "First day of week" or be able to select first day myself.

Describe alternatives you've considered
No

Additional context
Currently, I have Monday configured as first day of week in macOS settings (General -> Language & Region -> First day of week), and today (29.12.2024) is Sunday, i.e. last day of the week according to my current settings, but Streak shows todays contributions as a first block of a week instead of last block of the week