Rename `Mapper` binary

[mfbehrens]

TL;DR: It is suggest to rename the main executable from Mapper to a lower-case name.

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Renaming parts of project is always very difficult since the name sits in so many different locations.
Missing the rename in a single location can cause a lot of unforseen issues.

The good thing about renaming now is that OpenOrienteering Mapper has no CLI yet, so users don't rely on the current path in their scripts yet.
Almost all users just start Mapper via some link to the binary and not the binary itself.
On Windows replacing the Link to the startmenu should not be noticed by the most users.
On Linux a package manager controls the .desktopfile and so on.

Here are a few point why a rename could be a good idea:

• At least on Linux capitalized binares are very unusual
• Mapper as just part of this project's name. People also call it OpenOrienteering Mapper
• Mapper is too generic. It is included into the path, sits in /usr/bin folders and could refere to anything.

There are several options (lower option include the ones above):

• Just add a symlink that links to the old binary
• Just install the binaries into a different path
  • Maybe symlink Mapper to the new binary?
• Rename Package names
• Rename packaging internals
• Rename CMake internals

The new name also has to be debated

• Mapper
• mapper
• oomapper
• oo-mapper
• oo_mapper
• ooMapper
• openorienteering-mapper
• openorienteering_mapper
• openorienteeringmapper
• openorienteeringMapper
• open-orienteering-mapper
• open_orienteering_mapper
• openOrienteeringMapper

Please discuss here and not in #2523

[dg0yt]

FTR this is the current list of executables with names ending in "mapper" in Debian Linux:

/usr/bin/HPC.damapper damapper [nicht mips64el]
/usr/bin/IDMapper topp [nicht armel, armhf, mips64el]
/usr/bin/Mapper openorienteering-mapper [nicht mips64el]
/usr/bin/damapper damapper [nicht mips64el]
/usr/bin/keyd-application-mapper keyd-application-mapper
/usr/bin/omniMapper omniorb [nicht mips64el]
/usr/bin/pd-mapper protection-domain-mapper [amd64, armhf, arm64]
/usr/bin/yara_mapper seqan-apps [nicht armel, armhf, i386, mips64el]

Source: https://packages.debian.org/search?searchon=contents&keywords=mapper&mode=path&suite=stable&arch=any

[mfbehrens]

I think my personal favourite binary name would be openorienteering-mapper

Although it is quite long, I like that it contains the full name, makes it clear what this program is about and it is also in line with the standard most packages follow (at least in my bin folder). Noteably clang, systemd, grub, gnome, cosmic, git and gimp

As for the scope of renaming, i would suggest to:

• Rename all outward facing consistently to openorienteering-mapper
• Keep all interal names (Cmake)