Supported retries in database/sql generation for ydb (Related to #3)

examples/authors/sqlc.yaml

@@ -52,6 +52,7 @@ sql:
       package: authors
       out: ydb
       emit_json_tags: true
+      ydb_retry_idempotent: true
 
 
 rules:

examples/authors/ydb/query.sql

@@ -13,10 +13,10 @@ WHERE name = $p0;
 SELECT * FROM authors
 WHERE bio IS NULL;
 
--- name: Count :one
+-- name: CountAuthors :one
 SELECT COUNT(*) FROM authors;
 
--- name: COALESCE :many
+-- name: Coalesce :many
 SELECT id, name, COALESCE(bio, 'Null value!') FROM authors;
 
 -- name: CreateOrUpdateAuthor :execresult