feat: reduce search providers per config value "unified_search_providers_allowed"

[printminion-co]

Summary

This feature should help to restrict not desired search providers by allowing only desired search providers.

Before

One can see the /ocs/v2.php/search/providers deliver various search providers (you may see other providers on your nextcloud instance depending on installed/disabled apps).

After feature activation

One can see we allowed only the files and settings search providers (since we do not want to allow any other search providers).

CLI Example: restrict search providers to files and settings

• override happens via app core config unified_search.providers_allowed
  • reduce search providers by setting core app config value to unified_search.providers_allowed=[ 'files', 'setting' ]

./occ config:app:set --value '["files","settings"]' --type array core unified_search.providers_allowed

• initial config happens via IONOS/first-time-configure.sh

• override of translate in

  nc-server/core/src/components/UnifiedSearch/UnifiedSearchModal.vue

  Line 26 in b5b3016

  :label="t('core', 'Search apps, files, tags, messages') + '...'"

  happens via nc_theming app in order not to conflict with core translate files

• proposed search providers configuration to nextcloud feat: reduce search providers per config value "unified_search_providers_allowed" nextcloud/server#48841

TODO

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)

[github-actions]

Hello there,
Thank you so much for taking the time and effort to create a pull request to our Nextcloud project.

We hope that the review process is going smooth and is helpful for you. We want to ensure your pull request is reviewed to your satisfaction. If you have a moment, our community management team would very much appreciate your feedback on your experience with this PR review process.

Your feedback is valuable to us as we continuously strive to improve our community developer experience. Please take a moment to complete our short survey by clicking on the following link: https://cloud.nextcloud.com/apps/forms/s/i9Ago4EQRZ7TWxjfmeEpPkf6

Thank you for contributing to Nextcloud and we hope to hear from you soon!

(If you believe you should not receive this message, you can add yourself to the blocklist.)

[fracado]

Review OK