Test build for v0.3.1:
- Added custom oauth for imap, cardav, and caldav (designed for and tested with Stalwart)
- Custom oauth refresh token handling fix
- Use TOFU cert store for DAV certs
- Timezone config fix
- Multi-day week and day view fix
- Multi-day monthly view fix - #304
- Composer body config - #216
- Attachment parsing improvements - #307