Reimplement sc-core module with C++

[deniskoronchik]

That allow to avoid a lot of memory leaks and errors. Code will be much easier to support.

• [ ] implement ScStorageInterface in sc-memory. It would allow to implement different storage support.
• [ ] implement sc-storage implementation. It should support:
  • [ ] indirect edges search
  • [ ] content search functions
    • [ ] index for a numbers
    • [ ] index for a strings

Refs

• https://blog.memgraph.com/architecture-of-a-modern-graph-database-a-look-under-the-memgraphs-hood-89e6a8b41459
• https://en.wikipedia.org/wiki/Multiversion_concurrency_control
• https://github.com/khizmax/libcds - lock-free stuctures library

Ideas

• Use RocksDB as links content storage? https://github.com/facebook/rocksdb
• Use skip lists for and edge lists? https://en.wikipedia.org/wiki/Skip_list

Refs

• DataBase archutecture https://habr.com/ru/company/oleg-bunin/blog/358984/