Added vehicle search function + paginated vehicles page BOD-116

hasura/migrations/1594680221027_run_sql_migration/down.yaml

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+[]

hasura/migrations/1594680221027_run_sql_migration/up.yaml

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+- args:
+    cascade: true
+    read_only: false
+    sql: "CREATE OR REPLACE FUNCTION public.search_vehicles(search text)\n RETURNS
+      SETOF vehicles\n LANGUAGE plpgsql\n STABLE\nAS $function$\n\nBEGIN\n  if search
+      = '' then\n    return query select * from vehicles ;\n  else \n    return query
+      SELECT\n  *\nFROM\n  vehicles\nWHERE\n  search <% (v_vin) OR\n  search <% (plate_no);\n
+      \ end if;\n\n\tEND\n$function$;"
+  type: run_sql
+- args:
+    name: search_vehicles
+    schema: public
+  type: track_function