Use proper toolchain in Dockerfile

Improved configuration and documented options. Implemented option to disable web vault and to disable the use of bitwarden's official icon servers

Updated dependencies and created 'rust-toolchain', to mark a working nightly to rustup users, and hopefully avoid some nightly breakage.

It needs to be all uppercase otherwise the web vault doesn't load it

Update Vault to 1.27.0

Update rocket to 0.3.12

Better check for cipher access

Make sure the inputs are always in the same case (PascalCase, which is what upstream seems to prefer most of the time)

Enabled unused variable warning again, fixed some possible bugs where we didn't check some parameters, and explicitly marked all unused parameters (mostly orgheaders)

Clean up organizations.rs with new request guards

Support listing and deleting users from collection

Implement request guards for organization

Fix user invitation

Fix reference in attachments table