Implements option to build individual/groups of States/Regions

[ktehranchi]

Closes #292:

This PR implements the option to model individual or groups of regions. I have moved model topology related configurations into the new section called model_topology which is used to specify the regions to include

Example: Modeling California

To create a model that includes only California, you can specify the relevant ReEDS zone IDs (p8-11) as shown below. This will limit the spatial scope to the specified regions within California.

model_topology:
   include:
      reeds_zone: ['p8', 'p9', 'p10', 'p11']

Alternatively, you can use the reeds_state: 'CA' option to achieve the same result by specifying the entire state.

Other changes:

• upgrades environment for pypsa to 0.30.1 - so update your env!
• addresses the many old deprecation warnings we had around the workflow
• Throws GIS related files into a subfolder for each resource group
• Includes WIP for county level aggregation

Checklist

• I tested my contribution locally and it seems to work fine.
• Code and workflow changes are sufficiently documented.
• Changed dependencies are added to envs/environment.yaml.
• Changes in configuration options are added in all of config.default.yaml.
• Changes in configuration options are also documented in doc/configtables/*.csv.

[ktehranchi]

Hey @trevorb1 - let me know if this causes any conflicts with the county naming scheme in your sector work! idt it should. Also note the update to the env and the updated configuration files