Add a recipe for CLDConfig

[jmcarcell]

@Zehvogel
Installation is done here https://github.com/key4hep/CLDConfig/blob/e03be6e2caa7af1860844ee6fdc811e8449326dd/CMakeLists.txt#L28. If all looks good I think this should be ready.

[Zehvogel]

I think we need some more dependencies, at the moment this should not even be enough to parse the steering file

• k4MarlinWrapper
• MarlinTrkProcessors
• ConformalTracking
• DDMarlinPandora
• CLICPerformance
• LCFIPlus (but not used by default after Refactor II CLDConfig#30)
• MarlinFastJet

[Zehvogel]

can we also get a CLDConfig environment variable pointing to the install dir? :)

[jmcarcell]

Done. I think for consistency it should be CLDCONFIG, we only have lower case for some like k4geo_DIR but we use upper case for almost all of them.

[Zehvogel]

still missing MarlinFastJet

otherwise LGTM