Feature/add all registers that were added to venus since integration inception

[sfstar]

PR that prepares for the addition of all registers added or changed between the initial version from end of 2022 to the current v 3.5 version of the victron register spec. On hold until future is determined

[sfstar]

Some of the registers added in this PR don't return values which needs to be further investigated before merging this PR

[sfstar]

PR also introduces custom Ah unit of measurement since the discussion on the ha architecture repo has stalled: home-assistant/architecture#1052
The integration that currently uses Ah from within core uses an string definition of Ah.
Therefore, in preparation for future change and data consistency in the mean time this PR will introduce AMPHOURS as an constant and switch over the specific entities to Ah. Migration path Either through code or by release note instructions needs to be investigated

[github-actions]

This pull request is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 30 days

[tomer-w]

Hi @sfstar, thanks for all of your hard work here. Is there anything blocking this checkin? It has lot of valuable registers added here.

[sfstar]

@tomer-w,

This PR was almost ready to be merged.
I see the benefits of recommitting to getting this PR to land.
Unfortunately, I'm really scatter brained and I forget to consistently work on this integration as a result.

Have blocked an calender item for this weekend to see if I can land this PR.
For now I've resolved the merge conflicts.

Edit:
I've just tested it (to re-orient me on what was missing for this pr to be merged).
For existing intstallations the upgrade works fine however one of the updated register sets seems to be to large to query via modbus.
Thereby preventing scans and initial setup of the integration.
As far as it seems now it only needs some of the register sets to be split up for this change to be mergeable.