Add Peak Shaving work mode for H3 Inverters & H1 (Gen 2)

[FozzieUK]

Adds the Peak Shaving work mode in the select for H3 set Inverters & H1 (Gen 2)

See #699

[FozzieUK]

If anyone can assist with this -

This is for a small change to the workmode select for the H1_G2 and H3_SET it has been tested in operation ok but when doing the PR all of the tests are ok with the exception of pytest on the Inv.H3 - when I run a pytest --snapshot-update it fails with this error (as if the test script itself is breaking) but only on the Inv.H3 ?

FAILED tests/test_entity_descriptions.py::test_entity_descriptions_for_model[Inv.H3] - RuntimeError: dictionary keys changed during iteration

[FozzieUK]

To avoid the runtime error i've had to make a change in test_entity_descriptions.py, the pytest snapshot now works correctly and the output in the inverter model tests is correct.

[FozzieUK]

@canton7 Hi Antony would you please review this change - i've had a load of problems for what was only a minor change to the workmode select for the H3_SET to add 'Peak Shaving', and the pytest snapshots start to fail with a RuntimeError: dictionary keys changed during iteration.

When I looked more closely at the content of the existing tests I found that with work_mode select the test results were random and in the case of the H3_Pro incorrectly showing only 2 of the options - in the case of the Inv.H3 the snapshot crashed with the above error.

I've had to make a change in test_entity_descriptions.py changing from for k, v in d.items(): to for k, v in d.copy().items(): and the snapshots now run correctly (and i've verified each manually) but I would be grateful if you could check my logic !

[canton7]

Good catch on the test!

Thanks, looks good.