Implemented a mechanism to extract the correct time zone from the GPS coordinate if presented in the file's EXIF, and to convert the timestamp to the correct UTC time so that the time will show correctly based on the mobile/web local time zone.
* Add i18n framework to mobile app and write simple translation generator
* Replace all texts in login_form with i18n keys
* Localization of sharing section
* Localization of asset viewer section
* Use JSON as base translation format
* Add check for missing/unused translation keys
* Add localizely
* Remove i18n directory in favour of localizely
* Backup Translation
* More translations
* Translate home page
* Translation of search page
* Translate new server version announcement
* Reformat code
* Fix typo in german translation
* Update englisch translations
* Change translation keys to match dart filenames
* Add /api to translated endpoint_urls
* Update localizely.yml
* Add languages to ios plist
* Remove unused keys
* Added script to check outdated key in other translations
* Add download key to localizely.yml
Co-authored-by: Alex <alex.tran1502@gmail.com>