v0.7.0 - Module split

This release splits the module structure of ksrpc to cut down on dependencies for projects that down need them. The main library target no longer exists and is replaced with ksrpc-core and a number of other modules.

Other changes:

• Fix hanging for jvm + posix sockets on stdin/out
• Add support for ktor native cio engine
• Various style and license fixes
• Automation for pushing API docs