Compare datahike to more databases

[jsmassa]

Describe the feature you would like to request

To help other developer to decide for a database, so far, we describe differences to

• DataScript
• Datomic

This topic should be extended to other Datalog databases like

• XTDB
• Asami
• Datalevin

Describe the solution you would like

Write a new document addressing all of those databases.

Describe alternatives you've considered

Extending the section in the README.md would be also possible, but the section would become quite large.

[kordano]

@whilo How would you like to approach this?

[whilo]

You can also just point to https://clojurelog.github.io/ and skip specific opinions.