New version of wdb.server

Hi, @paradoxxxzero, I am glad to inform you that I rewrote your wdb server to aiohttp. If I forgot somewhere to indicate any copyrights or links to you - please let me know - I will add.

https://github.com/shepilov-vladislav/wdb_server_aiohttp

Start by reviewing the linked wdb_server_aiohttp repository and comparing it with the current wdb server. The issue does not name files, tests, or a specific change, so the intended scope and completion criteria would need clarification from the maintainers.

Written by the indexing model from the issue text.