Include simplified shipping export profile

[energyLS]

Closes # (if applicable).

Changes proposed in this Pull Request

Include simplified shipping export profile.
Remaining things to do:

• Solve ship case and plot it
• Solve constant case and plot it
• Compare outputs: When is hydrogen exported? See Balances
• Move from 300H to 3H
• Integrate creation of ship profile (open up PR for this task?)
• Profile begins with loading the ship, what are the system implications?

Checklist

• I tested my contribution locally and it seems to work fine.
• Code and workflow changes are sufficiently documented.
• Newly introduced dependencies are added to envs/environment.yaml and envs/environment.docs.yaml.
• Changes in configuration options are added in all of config.default.yaml, config.tutorial.yaml, and test/config.test1.yaml.
• Changes in configuration options are also documented in doc/configtables/*.csv and line references are adjusted in doc/configuration.rst and doc/tutorial.rst.
• A note for the release notes doc/release_notes.rst is amended in the format of previous release notes, including reference to the requested PR.

[energyLS]

Results for 3H, Co2L0.60, 9 TWh export, left: with ship profile, right: constant profile
Increased costs due to H2 balancing

Less CCGT (why? Balancing through H2 instead?):

[energyLS]

Export load for ship vs constant (9 TWh, 3H)

Hydrogen storages

[energyLS]

Check system at high export, and test the following hypothesis, following a discussion with @doneachh and @elliho:

• At higher export, the tendency towards hydrogen in ship modelling in disadvantage of CCGT will weaken, since at higher export the export profile will become more similar to the constant profile

[energyLS]

Notes:

• Look at extended capacities
• Rename "constant"