feature: add command flexmeasures add schedule for-process

[victorgarcia98]

Description

This PR introduces a custom CLI command to trigger process schedules.

Look & Feel

TOMORROW=$(date --date="next day" '+%Y-%m-%d')
 flexmeasures add schedule for-process --sensor-id 4 --start ${TOMORROW}T00:00:00+01:00 --duration PT24H --process-duration PT4H --process-power 0.4MW --process-type SHIFTABLE --consumption-price-sensor 2

How to test

1. Create toy account: flexmeasures add toy-account --kind process

2. Price data.

3. Call the scheduler:

TOMORROW=$(date --date="next day" '+%Y-%m-%d')
 flexmeasures add schedule for-process --sensor-id 4 --start ${TOMORROW}T00:00:00+01:00 --duration PT24H --process-duration PT4H --process-power 0.4MW --process-type SHIFTABLE --consumption-price-sensor 2

Related Items

#729

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• I agree to contribute to the project under Apache 2 License.
• To the best of my knowledge, the proposed patch is not based on code under GPL or other license that is incompatible with FlexMeasures

[nhoening]

Idea: Should we extend add toy-account so that --kind shiftable-load becomes possible, as well?

Then your example would become shorter :)

But also it would be a useful addition, which we might expand for a shiftable load tutorial later (e.g. with a limited capacity, or with two shiftable processes ...)

[nhoening]

Great stuff.

Also needs an entry in the CLI changelog and I would add this PR to the changelog about the shiftable scheduler.

[nhoening]

I think I found one more possible improvement.

[nhoening]

You solved the CLI test issue to the best of our abilities right now, thanks.