Add new sensors with translations to Overkiz, and fix minor bugs

[iMicknl]

Proposed change

If this is too big, I can split it up in multiple PR's, however since most of them are relatively small fixes I decided to couple them to not make a load of PR's. Would be good to have at least the bugs fixed.

• Add missing buttons from custom component
• Add missing sensors from custom component
• Add missing binary sensor from custom component (left out due to typing issues before)
• Translate sensors and use keys by default, instead of capitalizing them
• Fix bug in device info 'model' where a Enum could be stringified
• Fix bug in battery sensor where output was apparently a string (100 %) instead of int
• Remove extra dot from translations

This will fix and finish all current platforms that are in dev for now, so that it is ready for next core release.

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)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request:

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.

The integration reached or maintains the following Integration Quality Scale:

• No score or internal
• 🥈 Silver
• 🥇 Gold
• 🏆 Platinum

To help with the load of incoming pull requests:

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

[probot-home-assistant]

Hey there @vlebourl, @tetienne, mind taking a look at this pull request as it has been labeled with an integration (overkiz) you are listed as a code owner for? Thanks!
_{^{(message by CodeOwnersMention)}}

[iMicknl]

Discussed with @epenet to split it up in multiple PR's. Closing this one for now.