Add Open Computer Orchestration (OCO)

[schorschii]

As suggested in awesome-foss/awesome-sysadmin#682 (comment), I'm submitting OCO here.

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• Submit one item per pull request. This eases reviewing and speeds up inclusion.
• Your addition is Free software.
• You have searched the repository for any relevant issues or PRs, including closed ones.
• Any software you are adding is not already listed at any of awesome-selfhosted, dbdb.io.
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• The file you are adding uses kebab-case file naming, for example my-awesome-software.yml.
• Values for platform should match the platforms required to install and run the software.
• Any software project you are adding to the list is actively maintained.
• Any software project you are adding was first released more than 12 months ago.
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Please take some time to answer the following questions as best you can:

• Why is it awesome?

Central management of all major platforms - Linux, macOS, Windows, iOS & Android clients. Cross-platform group policies, WOL/Shutdown scheduler, event log monitoring, self-service portal for end-users etc.

• Have you used it? For how long?

Since the first release in 2021.

• Is this in a personal or professional setup?

Professional.

• How many devices/users/services/... do you manage with it?

~900 devices

• Biggest pros/cons compared to other solutions?

There is no other open source project which supports all platforms and has this feature set. Easy to setup and use, user-friendly web interface.

• Any other comments about your use case, things you've found excellent, limitations you've encountered... ?