Add CPU Power to System Bridge

[timmo001]

Breaking change

Proposed change

Adds CPU Power to System Bridge integration.

Package change:
https://github.com/timmo001/system-bridge/releases/tag/3.4.9

Type of change

• Dependency upgrade

• New feature (which adds functionality to an existing integration)

Additional information

• Link to documentation pull request: Add CPU Power to System Bridge home-assistant.io#24657

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• The code has been formatted using Black (black --fast homeassistant tests)
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• For the updated dependencies - a link to the changelog, or at minimum a diff between library versions is added to the PR description.
• Untested files have been added to .coveragerc.

To help with the load of incoming pull requests:

• I have reviewed two other open pull requests in this repository.

[akx]

A couple of comments (as part of "review 2 PRs for each one you make")