Update energy docs to include power

[MindFreeze]

Proposed change

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 logos 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 power configuration to Energy dashboard frontend#27373
• 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.

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[Copilot]

Pull Request Overview

This PR updates the Home Assistant energy documentation to clarify that power sensors (measured in Watts) can now be used directly in the Energy Dashboard alongside energy sensors. Previously, the documentation only mentioned energy sensors and required users to convert power sensors using the Riemann sum integral integration.

Key changes:

• Clarifies that power sensors can be added directly to the Energy Dashboard when they have appropriate attributes
• Updates troubleshooting documentation to include power sensors alongside energy sensors
• Adds comprehensive information about power sensor requirements (device_class, state_class, and units)

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
source/_docs/energy/individual-devices.markdown	Adds clarification that power sensors can be added directly with appropriate attributes
source/_docs/energy/faq.markdown	Updates troubleshooting section to include power sensors with device_class and state_class requirements
source/_docs/energy/electricity-grid.markdown	Updates troubleshooting text to mention both energy and power sensors
source/_docs/energy.markdown	Adds new paragraph explaining power sensor configuration requirements

[c0ffeeca7]

Thank you, @MindFreeze 👍