feat: locations tree viewer (#248)

* location tree API

* test fixes

* initial tree location elements

* locations tree page

* update meta-data

* code-gen

* store item display preferences

* introduce basic table/card view elements

* codegen

* set parent location during location creation

* add item support for tree query

* refactor tree view

* wip: location selector improvements

* type gen

* rename items -> search

* remove various log statements

* fix markdown rendering for description

* update location selectors

* fix tests

* fix currency tests

* formatting

backend/internal/data/repo/repo_items_test.go

@@ -36,6 +36,8 @@ func useItems(t *testing.T, len int) []ItemOut {
 		for _, item := range items {
 			_ = tRepos.Items.Delete(context.Background(), item.ID)
 		}
+
+		_ = tRepos.Locations.Delete(context.Background(), location.ID)
 	})
 
 	return items