Extract everest.jobs.shared module to it's own lib package

[sregales-TNO]

There are talks of making a forward-model library that others can use as a dependency to build their own.
Thus we can formalize this by pulling the shared library onto its standalone library. And flush out the standards that we forward models to adhere to.

Within the shared package there's a sub-package, models that hold the libraries for introspective Pydantic models. Introspective trait allows the object to self-describe/document its specifications.

Model will also need to be a standalone package, so other projects, such as Everest, that need to employ the same behavior can do so.

❯ tree src -I __pycache__ -I everest_models.egg-info -L 3 -d
src
└── everest_models
    ├── forward_models
    └── jobs
        ├── fm_add_templates
        ├── fm_compute_economics
        ├── fm_drill_date_planner
        ├── fm_drill_planner
        ├── fm_extract_summary_data
        ├── fm_interpret_well_drill
        ├── fm_npv
        ├── fm_rf
        ├── fm_schmerge
        ├── fm_select_wells
        ├── fm_stea
        ├── fm_strip_dates
        ├── fm_well_constraints
        ├── fm_well_filter
        ├── fm_well_swapping
        ├── fm_well_trajectory
        └── shared  <