feat(sensor): expose next action date/time for MiniBrew devices

[Copilot]

This issue asks the integration to surface the date/time for the next required action (as shown in the app UI card, e.g. “Your action needed: Monday, June 22 - 23:07”).
This PR adds that value as a dedicated sensor entity for both Craft and Keg devices.

• What changed

  • Added next_action_datetime sensor entities for:
    • Craft devices
    • Keg devices
  • Registered both sensors during device sensor setup.

• Sensor behavior

  • Reads the next-action date/time from sub_title.
  • Only exposes a value when user_action indicates action is required.
  • Returns None when no action is required / data is unavailable.
  • Marks the new sensors as diagnostic entities.

• Localization + docs

  • Added translation key: next_action_datetime (strings.json, translations/en.json).
  • Updated README sensor feature lists (Craft + Keg) to include “Next Action Date and Time”.

action = device.get("user_action")
if action == 0 or action is None:
    return None
return device.get("sub_title")  # e.g. "Monday, June 22 - 23:07"

[github-actions]

Preview Release Created

A preview release has been created for testing this PR.

Version: 0.8.0-preview.22.6841eca
Release: https://github.com/stuartp44/hambrewclient/releases/tag/v0.8.0-preview.22.6841eca

How to Test

1. Go to the draft release
2. Download minibrew-0.8.0-preview.22.6841eca.zip
3. Extract to your Home Assistant custom_components directory
4. Restart Home Assistant
5. Test the changes and report back here

Or install directly via HACS:

# Add custom repository in HACS:
https://github.com/stuartp44/hambrewclient

# Then select version: 0.8.0-preview.22.6841eca

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WARNING: This is a preview release - do not use in production!

Once testing is complete and approved, this PR can be merged for an official release.

[dut97]

Hi Stu, unfortunately it doesn't work. See screendump on my original post.