Include index size on the index list view

pkg/statements/sql.go

@@ -50,7 +50,9 @@ WHERE
 
 	TableIndexes = `
 SELECT
-  indexname, indexdef
+  indexname AS index_name,
+  pg_size_pretty(pg_table_size(indexname::regclass)) AS index_size,
+  indexdef AS index_definition
 FROM
   pg_indexes
 WHERE