JediBones : An example

### Core PoC Branch
https://github.com/mo-rickywong/lfric_core/tree/Jedi_Two_Cfg_Example

### Brief description

**JediBones**

* Based on LFRic Core Skeleton app.
* Takes two configuration namelists from command line
* Added to Rose-Stem test suite so that 2 configuration files are created before calling program.
* Example uses base Rose-Metadata from skeleton along with local Rose metadata as specified by JediBones. Rose metadata could be imported from other sources. Crucially only one "superset" of rose-meta.conf is generated (for the configurator) to work.
* ClI modified, though is a temporary hack

**NOTE:** The branch is a Proof of Concept (PoC) and not for commit to trunk. Whatever app is used for Jedi, it should be on the the LFRic_apps repo

### Further details of the issue.

_No response_

Start with the Jedi_Two_Cfg_Example branch and compare it with the LFRic Core Skeleton app. Read how the Rose-Stem test suite creates the two configuration files and how the temporary CLI change passes them to the program. Done means defining whether JediBones belongs in lfric_core or LFRic_apps and replacing the PoC with an accepted implementation.

Written by the indexing model from the issue text.