* Clean up internal localisation header includes
* Remove some external localisation includes
* Remove dependency on FormatCodes.h from InteractiveConsole.h
* Reduce Formatter.h, Localisation.Date.h includes
* Refactor and clean up date handling
* Remove gDate, remove direct access to days_in_month
* Adjust the MultiLaunch test
* Bump network version
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Co-authored-by: ζeh Matt <5415177+ZehMatt@users.noreply.github.com>
Clang-format sees the text behind `#pragma region` as code and formats it. Instead of stating the copyright and date there, it's now in the comment block right below it. The text "Copyright" is left in the `#pragma region` line, as clang-format sees it as a single identifier.
I took the opportunity to normalize the dates, and add the copyright notice to the source files where it was missing them (except for third-party and the generated resources.h file).
