WIP Migrate scala-client to SDK.v2 + libuast.v3

[bzz]

TODOs

• move to SDK.v2
• decode() imp
• encode() impl
• load() impl
• filter()
• Context impl (JVM-side factory)
• move to libuast v3.2.0
• iterators
• SDK.v1: supported languages/version req + tests
• C++ improvements: better error handling, extract constants, etc
• fix warnings on -Xcheck:jni
• bump SDK version to latest
• expose grpc Deadline though Parse API (similar to Set timeout for parse request #78)

Signed-off-by: Alexander Bezzubov bzz@apache.org

[bzz]

Scope updated to include #78 equivalent, but for v2

[erizocosmico]

Do we have any estimation for when this will land?

[bzz]

Do we have any estimation for when this will land?

Not yet. I would say it mostly depends on how badly other teams would need it for the next quarters OKRs.

[bzz]

Closing in favor of #83

This code will be re-used, but in smaller chunks, as in #82.