Aiosql

- add official support for MS SQL Server with `pymssql`.
- pass misc parameters to cursor in generic adapter.
- further improve typing to please pyright.
- minor doc fixes…
- improve one error message.
- reduce verbosity when overriding an adapter.
- refactor tests, simplifying the structure and adding over 50 tests. in particular, schema creation now relies on *aiosql* features instead of using driver capabilities directly.

- improve documentation.
- upgrade sphinx and corresponding read-the-doc theme.

- update and improve documentation.
- do not allow to override existing queries, as it can lead to hard to understand bugs.
- use ``pytest.fail`` instead of ``assert False`` in tests.

- add history of versions to documentation.
- improved comments and doc strings.

Add _Pypy 3.10_ and _Python 3.13_ to GitHub CI.

- keep special hint comments `/*+ ... */`