Clarify the use of LongName and further restrict characters in Name

[petrvanekrobe]

The LongName usage is not specified and the Name can still contain characters problematic for a filesystem.

[petrvanekrobe]

#36

[petrvanekrobe]

For the LongName, suggest this recommendation:

LongName String Detailed, complete name of the fixture
type, can include any characters or extra symbols. Recommended for fixture listing and search.

We would suggest to use modified MVR FileName for the GDTF definition of Resource. Consider specifying the maximum length. Windows 260 characters

https://learn.microsoft.com/en-us/windows/win32/fileio/maximum-file-path-limitation?tabs=registry

The case-sensitive name of a file within the archive including the extension.
The filename must not contain any FAT32 or NTFS reserved characters.
The extension is delimited from the base name by full stop '.' and the base name shall not be empty.
It is recommended to limit filenames to the POSIX "Fully Portable Filenames" character set: [A-Z], [a-z], [0-9], the symbols '_' (U+005F), '-' (U+002D) and a maximum of one '.' (U+002E)
Eg My-Fixture_5.gdtf

ShortName - used in the ui in places where there is not enough space.

Make an appendix describing to search in long name and name, display name, explain the topic.