Add ISY994 variables as number entities

[shbatm]

Proposed change

Add the number platform to ISY994 and move ISY/IoX Variables from sensor with a custom service to the new platform.

There is an existing Config Option for choosing which Variables are added to Home Assistant. This is now used to determine which entities are enabled by default, but all Variables can now be imported.

Type of change

• Spelling, grammar or other readability improvements (current branch).
• Adjusted missing or incorrect information in the current documentation (current branch).
• Added documentation for a new integration I'm adding to Home Assistant (next branch).
  • I've opened up a PR to add logo's and icons in Brands repository.
• Added documentation for a new feature I'm adding to Home Assistant (next branch).
• Removed stale or deprecated documentation.

Additional information

• Link to parent pull request in the codebase: Add ISY994 variables as number entities core#85511
• Link to parent pull request in the Brands repository:
• This PR fixes or closes issue: fixes #

Checklist

• This PR uses the correct branch, based on one of the following:
  • I made a change to the existing documentation and used the current branch.
  • I made a change that is related to an upcoming version of Home Assistant and used the next branch.
• The documentation follows the Home Assistant documentation standards.

[shbatm]

Note: expecting a merge conflict when #25609 is merged. Will update after.

[frenck]

✅ Approved. Can be merged as soon as the parent PR gets merged.

[shbatm]

Merge conflict fixed.

[bdraco]

Thanks @shbatm