feat: add full text search

graphql/queries/FindEvents.graphql

@@ -1,5 +1,5 @@
-query FindEvents($range: Range, $origins: [String!], $includeOrigins: Boolean!) {
-  events: Events(range: $range, origins: $origins) {
+query FindEvents($range: Range, $origins: [String!], $includeOrigins: Boolean!, $search: String, $includeHidden: Boolean) {
+  events: Events(range: $range, origins: $origins, search: $search, includeHidden: $includeHidden) {
     date
     time
     band {