This includes configurations for Sphinx and generating Ligare
documentation. It also includes a handful of docstring fixes to make
Sphinx happy.

This reorganization helps us store documentation in a more hierarchical
format. It also avoids us having to type something like
`../../../../../source/whatever` to get Sphinx to render and link pages.

applications.

* Ligate.AWS (incomplete)
* Ligare.GitHub (incomplete)
* Ligare.database
* Ligare.identity (incomplete)
* Ligare.platform (incomplete)
* Ligare.testing
* Ligare.web

This class is partly a copy of the application builder in Ligare.web,
but more generic. This is a precursor to further refactoring and
changing Ligare.web to use the Ligare.programming builder.

This is a breaking change to remove the previously deprecated
`create_app` and `App[T].create_app` functions. Use
`ApplicationBuilder`.

…rogramming`.

This change is necessary to allow non-web applications like CLI apps.

type generic var binding.

applications error free when using pyright.

* Move the builder exception types from Ligare.web to Ligare.programming
* Guard against loading Ligare.AWS if it's not installed
* Add toml to Ligare.programming's dependencies

web Config type by default.

Also remove the `with_root_config_type` method to simplify the builder
and prevent misuse. This change is needed so application authors don't
need to do this, and this is safe because web applications all use the
web Config type as their root config.

… problems.

This allows web applications to rely on the config system to set the
application name rather than relying on hard-coding it.

When the Swagger URL is `/` or ``, the application crashes on any
request. This is because Connxeion registers conflicting Blueprint URLs
for anything in the OpenAPI spec by using the same base URL as the Swagger
URL. This is not resolved by changing the base path in the OpenAPI spec,
because Connexion will use that base path instead.

Also removed some obsolete and unused code.