Add searchbar to geomap

[katharinawuensche]

We would like to add a searchbar component and a simple parsing functionality that makes the formuliation (and citation) of queries easier than clicking through all the dropdown menus and checkboxes.

• The searchbar should support queries like feature:predicate_negation and feature_value:mub, similar to the searchbar in Github.
• Operators like AND and OR should be supported as well.

liqe or search-query-parser could be good candidates for parsing the queries.