Add missing `@file` Doxygen command

[gabryelreyes]

All files in the repository missing the doxygen @file attribute which is required for using grouping IMHO. Can you add it to these files already?

Originally posted by @BlueAndi in #212 (review)

[gabryelreyes]

https://www.doxygen.nl/manual/commands.html#cmdfile

The command does not require the file name as input if the name of the file is correct for the grouping, therefore @file is sufficient.
@BlueAndi shal the file name be appended to the command in every file?

[BlueAndi]

https://www.doxygen.nl/manual/commands.html#cmdfile

The command does not require the file name as input if the name of the file is correct for the grouping, therefore @file is sufficient. @BlueAndi shal the file name be appended to the command in every file?

We saw in lobster-doxygen that enable extract all is not sufficient. @file is required in all files in the doxygen header once.