Flasksimpleauth

- require _Flask 3_ (September 2023) to use JSON provider infrastructure and _CacheToolsUtils 10.0_.
- add `FSA_JSON_CONVERTER` directive to manage per-type JSON serialization
- add `add_json_converter` per-type hook registration.

- unsuccessful attempt at adding _Python 3.14_ to CI.
- improve dev automations, including parallelizing tests.
- improve tutorial.
- add experimental `FSA_CACHED_OPTS` directive.

- add JsonData section to tutorial.
- password manager refactoring
- add **experimental** support for _LDAP_ authentication.

- updated tutorial.
- improve recipes.
- improve documentation.
- improve optional parameter support.

- makes `FSA_AUTH` mandatory to declare the list of allowed schemes.
- requires _none_ authentication on `OPEN` routes, otherwise they are
turned into `AUTH`. (Should it rather be an error?).
- `AUTH` routes without effective authentication are turned into `CLOSE`.
- improve type name display on some errors.
- update tutorial.

- Add dependency on [`crypt_r`](https://github.com/fedora-python/crypt_r)
for _Python 3.13_ so that `passlib` works there too.
- Require that all used authentications are explicitely enabled from `FSA_AUTH`.
- Delay initialization after authentication schemes are registed.
- Check that authentication schemes exist while configuring.
- Simplify `password` authentication implementation.
- Restrict `auth` decorator parameter to `str` or `list[str]`.
- By default, no authentication scheme is enabled, instead of `httpd`.
- Update tutorial to mention `FSA_AUTH_DEFAULT`.
- Fix typos in documentation.