Update metadata-schema.yaml

[vcellmike]

Hello,

I've added some new keys to metadata, such as related to VCell and other rule-based tools.

Major changes to the existing schema:

• category (which is now single value and includes such different terms as tutorial and immunology) is divided into two lists: one is biol_categories, one is comp_categories.
• new keys in compatibility
• features are added, where I collected existing (e.g. uses_energy) and added many more that affect other tools (such as uses_multiple_identical_sites).
• uses_compartments is replaced with uses_cbngl_compartments, as I have also uses_vcell_compartments.

Minor changes:

• added comments
• added tested
• added default_sim_command - the one that is actually in bngl

[jrfaeder]

Please address the file causing the validation to fail.

[vcellmike]

The new .yaml examples file was an accident. Schema is updated with the year. Please use default values when updating all yaml files for the new schema:
rr_compatible: true
bnglviz_compatible: true
vcell_compatible: false
molclustpy_compatible: false

[jrfaeder]

Ok, it's still failing the CI check but maybe that's premature anyway since updating model data is a work in progress. I will go ahead and merge.