* Doc updates and API refactoring
* fix tests
* change metadata fieldtype to TypeKVPairs
* Give example for TypeKVPairs in CLI for metadata
* Update API docs examples to reflect the native expected value for TypeKVPairs
* Don't mention comma separation in the docs for TypeCommaStringSlice
* s/groups/group; s/entities/entity; s/entity-aliases/entity-alias; s/group-aliases/group-alias
* Address review feedback
* Fix formatting
* fix sidebar links
This removes all references I could find to:
- credential provider
- authentication backend
- authentication provider
- auth provider
- auth backend
in favor of the unified:
- auth method
