[WIP] Use grouping labels from 1.5

[AamuLumi]

Rimworld 1.5 added a groupingLabel property on XML defs.
This property allows a building to be categorized for the Take to XXX destination in any workshop (cf Rimworld.Dialog_BillConfig#206). We can also group any Building_Storage with others to create new storage areas.

To implement these features, each building needs to implement a Thing extending Building_Storage and IRenamable instead of only Building_Storage before 1.5.
Adding IRenamable on the building add the possibility to rename directly the storage building by creating a group on the rename. There's also a rename option available in the bottom-left drescription window (next to the icon i).

This PR is a starting point to implement these features. By moving the renaming logic, I don't know if Dialog_CompSettings must be kept.

This work is based on the one from @just-harry on RimFridge.

Missing :

• translations
• removing old code ? Should the mod always allow user to do some group buildings configuration out of the current possibility offered by Rimworld 1.5 ?

[lilwhitemouse]

Oh my, this looks like it's going to parallel a lot work I did for storage building settings. Thanks for putting this together