Feat/P2P FFI Layer

[nipsysdev]

Attempt at implementing an FFI Layer for Archivist and producing static & dynamic C libraries for Archivist.
This is focusing on the core P2P logic, not the marketplace.
I tried following the work that was done in the Logos Storage FFI layer.

Build and run the tests:
cd library && make && make test

This PR is still a WIP, here is what I identified as missing:

archivist_context.nim

• Archivist context isn't processing requests concurrently

libarchivist.nim

• Missing parsing of configJson and node configuration when instantiating a new archivist node
• archivist_close seem to be missing some logic

archivist_thread_request.nim

• Improve callback handling for concurrency

node_debug_request.nim

• Debug requests processing still need to be implemented

node_info_request.nim

• I'm not sure about hardcoding archivist version and revision there
• Missing retrieval of repo path from config

node_lifecycle_request.nim

• Fix configuration loading srialization issues which made me hardcode the config instead
• I don't think the data directory creation should be ignored when an exception is thrown

archivist-node/library/archivist_thread_requests/requests/node_storage_request.nim

• Missing implementation to query repo store
• Missing implementation to check block existence