Now notes are saved in the git repo, and immediately synced. This is not
the best implementation, as the notes are being reloaded a lot, and
the error handling is terrible (I miss golang). But it's the first
working poc.
We get the path ourselves as the 'git plugin' is using the
android 'getFilesDir()', instead of 'getDataDir()' which is what the
path_provider returns.
It's strange that it returns the latter as the Android docs clearly
state that one should not use this path and should use getFilesDir
instead.
This simplifies the code quite a bit, at the cost of using this
strange flutter magic of an 'InheritedWidget'.
It basically make a class a global variable.
