This change adds a .idea/codeStyles/Project.xml file that orders all
imports from higher-level layers to lower-level layers, with blank lines
between different major packages.
The purpose of this approach is to allow the reader to scan the imports
in a file efficiently to understand what kind of work the class does,
what layers it touches, and so forth. Keeping imports clean and ordered
by layer can be a powerful tool in keeping a codebase well organized and
tangle-free over time.
bisq.* packages are always sorted at the top.
This change is the result of a global reformatting in IDEA now that
`.editorconfig` settings are in place. Note that Editorconfig's
`continuation_indent_size` property [1] was also added and set to 8
here, as this reflects the dominant style already present in the
codebase. i.e. in created a much smaller diff to set the continuation
indent to 8 that would have been created leaving this property out and
letting it default to 4.
[1]: https://github.com/editorconfig/editorconfig/wiki/EditorConfig-Properties