Users can rely on a stable Clojure/Java/HTTP API

[x] HTTP API needs to be consistent with the Clojure API (endpoints currently have different names)
[x] 'sync' - deprecate and replace with 'await-tx'?
[x] We have a number of history functions on the API, some eager, some lazy - let's coalesce around one (probably lazy?)
[x] Snapshots/tx-log-contexts - should/how should we expose these to users?
[x] How can we best help users construct topologies?
[ ] Async Clojure API as first class citizen?
[x] Card in for removing the Clojure -> Java -> Clojure dance
[x] Card in for removing the legacy Java API
[x] Validate remote Java API client for the new API
[ ] Should we expose #crux/id at all?

xtdb / xtdb