Add foscam coordinator

[krmarien]

Breaking change

Proposed change

Add foscam coordinator to support later on a switch for toggling the sleep mode

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

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• This PR fixes or closes issue: fixes #
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[home-assistant]

Hey there @skgsergio, mind taking a look at this pull request as it has been labeled with an integration (foscam) you are listed as a code owner for? Thanks!

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[krmarien]

Split #81325 -> this includes the coordinator change only

[gjohansson-ST]

Did a first pass.
There is quite some missing typing and also as you are bumping the library please include a release note or change-diff as mentioned in the PR description.

[home-assistant]

Please take a look at the requested changes, and use the Ready for review button when you are done, thanks 👍

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[github-actions]

There hasn't been any activity on this pull request recently. This pull request has been automatically marked as stale because of that and will be closed if no further activity occurs within 7 days.
Thank you for your contributions.

[edenhaus]

Please make sure the CI is passing.

Also, please include the reason for creating a coordinator in the description.
The coordinator requests every 30 seconds two endpoints and the camera is not using this data et all. Therefore the coordinator is only being used for the availability property of the camera.

[gjohansson-ST]

Add test coverage to the coordinator or exclude it from the tests (preferably you create tests 👍 )

[gjohansson-ST]

Thanks @krmarien 👍

comments addressed