Until a better solution can be found for types that appear both in
request & response types and would otherwise require incoming types to
appear as fields of outgoing types.
Some types used for encryption related tasks need to be used across more
internal crates than expected, so a few have been moved and renamed for
clarity.
* Rename the key_algorithms module in ruma-identifiers-validation to crypto_algorithms
* Move ruma_events::Algorithm to ruma-identifiers-validation and rename it EventEncryptionAlgorithm
* Move DeviceKeys from ruma-client-api to ruma-common
