Migrate code from message_data

[khaeru]

This is a tracking issue for other issues/PRs to migrate code from message_data to this package.

• .tools.context: Context class used for carrying settings and configuration values. → Migrate Context class and related pieces #5
• More pieces of the command-line interface (CLI). → Migrate command-line utilities #8
• model.build and model.bare: code that creates the "bare"/empty MESSAGEix-GLOBIOM reference energy system (RES), without any data. → Migrate .model.build and tools for creating the ‘bare’ RES #9
• model.disutility: generalized disutility formulation. —Migrate .model.disutility #13
• .tools.cache —Small testing improvements #26
• .reporting: Core reporting configuration and global.yaml. rolled into Integrate ‘new’ and ‘legacy’ reporting #27
• Codes for retrieving/reading/processing certain input data:
  • .tools.gea: GEA database. —Miscellaneous improvements for 2024-W14 #162
  • .tools.ssp: SSP database. Superseded by Add data providers for SSP data #125
  • .tools.iea_eei: IEA energy efficiency indicators (EEI) database. —Miscellaneous improvements for 2024-W14 #162
• General documentation about development.
  • Expand ‘Reproducibility’ docs page #226

[khaeru]

Closing, as the checklist is completed. Some other items are preserved in still-open issues and PRs like #27 and #254.