Unified debug slash command names

[Mailaender]

I use the debug chat commands a lot and what annoys me when using tab completion is that they all start with the same redundant word like /show or /debug so there is a high chance it picks the wrong one. This renames all of them to the clear and concise style of #11544 as /exits-overlay makes it clear what it is about and the dash between the nouns helps with readability. It doesn't change them too much so hopefully, so muscle memory stays mostly intact.

[abcdefg30]

Lgtm that aside. It might be worth moving those out to string constants to avoid such errors.

[pchote]

IMO adding a bunch of string constants that are each only used twice isn't a great solution for those files. A better approach would be to define a dictionary of name → (desc, handler) similar to how we do in LobbyCommands.

This brings the same benefits but with significantly less boilerplate.

[Mailaender]

Updated as suggested.

[teinarss]

https://github.com/OpenRA/OpenRA/wiki/Changelog-(bleed)/_compare/543fe3054e86b88cd312d2c9cdcb7e1cf03ac68d...20785496eb02814c49e5ff2756b28258bbfdb7fd