Implement search widget

[sigve10]

This issue is resolved when:

• Search is a widget that can be placed on any screen
• The search widget allows for entering text to search
• The search widget expands to reveal additional information when focused
• The search widget presents the user with primary tags (like food, hygiene, ...)
• The search widget presents the user with an "autocomplete" widget to let them search for user-generated tags
• The app has a search provider, which handles storage of search data (such as search term and tags)
• The app attempts to request information from supabase relevant to the filter

[sigve10]

Left to do:

• Connect search widget to search provider
• Make autocomplete widget add chips to tag selection
• Styling