- point to main Calamares site in the 'part of' headers instead
of to github (this is the "this file is part of Calamares"
opening line for most files).
- remove boilerplate from all source files, CMake modules and completions,
this is the 3-paragraph summary of the GPL-3.0-or-later, which has
a meaning entirely covered by the SPDX tag.
- PartitionInfo maintains information on "what is desired" for
a given Partition. Now we can set desired flags, alongside
the flags already supported by Partition (where activeFlags()
gives you the flags currently set on that partition).
