Add member organizations to opensearch

[epipav]

What

🤖 Generated by Copilot at e08eaa1

This pull request adds the functionality to view and delete an activity from the frontend and to sync the organization data of a member from the database to the search engine. It modifies the activity-timeline.vue component, the IDbMemberOrganization interface, the member repository, the member sync service, and the member translator.
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🤖 Generated by Copilot at e08eaa1

activity dropdown
sync memberOrganizations
autumn of data

Why

How

🤖 Generated by Copilot at e08eaa1

• Add a dropdown component to the activity timeline component to view and delete an activity (link)
• Add and sync the organization data of the members from the database to the search engine (link, link, link)
• Add the translations for the organization data of the members from the search engine schema to the frontend schema (link)

Checklist ✅

• Label appropriately with Feature, Improvement, or Bug.
• Add screehshots to the PR description for relevant FE changes
• New backend functionality has been unit-tested.
• API documentation has been updated (if necessary) (see docs on API documentation).
• Quality standards are met.