[Feature] Share dynamic searches with access-controlled, live results

I have searched the existing feature requests, both open and closed, to make sure this is not a duplicate request. • Yes The feature Summary Allow users to save advanced searches and share them with other people as live, read-only collections, without having to create or maintain albums. Motivation Immich has a powerful tagging system, including hierarchical tags. However, there is currently no way to share the results of a saved search with other people. Albums are not an adequate solution because search results can change over time as photos are added, removed, or retagged. I would like to share a search query itself, rather than a static collection of photos. Proposed functionality 1. Advanced Boolean tag searches Support combining tag conditions using AND, OR and NOT. For example: 2. Hierarchical tag matching Selecting a parent tag should automatically include all descendant tags. For example, selecting France should match: ̶…