Hosting documentation is confusing

[timbussmann]

We have two main documents describing hosting options:

• https://docs.particular.net/nservicebus/hosting/
• https://docs.particular.net/nservicebus/hosting/selecting

both pages contain similar content with some variation. The categorizations are a bit weird, for example:

• it describes send-only endpoints as a specific hosting option rather (it also seems to be the only place it is really mentioned).
• the generic host is listed as a specific hosting option although it offers a variety of hosting integrations, e.g. including web applications
• windows service hosting is in the "self-hosting" option which is explicitly separate from the generic host but links to the guidance which uses the generic host

Overall it seems the two pages have a lot of duplication and not a clear enough separation in regards to the documentation goal. The categorization of hosting options seems to be based on old versions and doesn't align well anymore with current hosting options.