CURA-12138 export for support option

[wawanbreton]

CURA-12138

• Allow saving a project file without setting the name as the project name
• Allow giving extra arguments to a file writer
• Allow FileLogger to flush the current file and returns the list of used files paths

ℹ️ This does include a change in the signature of WorkspaceWriter.write which is a base method overridden by plugins. The change is only adding **kwargs to the signature, and I did check that a plugin not updating his signature would still properly get the function call. This should then be natively retro-compatible.