-Split mimedecode.py into a library and a small script.
-Move formatparam_27.py and mimedecode_version.py to the library.
-Rename mimedecode_version.py to __version__.py.
+Use https://pypi.org/project/standard-mailcap/ for Python 3.13+.
+
+
+Convert mimedecode.py library from global functions to a class.