Flasksimpleauth

- Refactor and rework parameter handling, including http list support.
- Forbid mixing http and json parameters.
- Improve and fix some tests.
- Improve documentation, tutorial and recipes.

- Add `FSA_JSON_STREAMING` option to work around database connections staying as _idle in transaction_.
- Refactor generic type handling, to be continued.
- Handle repeated HTTP parameters as `list[str]`.

- Experimental handling of generic types for parameters

- Fix to handle `FileStorage|None` special parameters.
- Improved recipes.

- allow setting cache directly
- improved documentation
- improved typing
- improved CI
- improved JSON handling
- improved test resilience

- Improved typing