Add SPDX header - batch 8

[AndyScherzinger]

• Resolves: SPDX batch 8

Summary

get some apps/ done with SPDX headers

• files with copyright information: 9963 / 10961
• files with license information: 8725 / 10961

TODO

• add remaining files
• get it reviewed and merged

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[AndyScherzinger]

Any help or pointers on how to fix https://github.com/nextcloud/server/actions/runs/9274173027/job/25516154351?pr=45554 is highly appreciated 🙏

@susnux maybe?

[AndyScherzinger]

/compile /