Improve Rholang extension for Visual Code

[9rb]

Description: (Tomislav to correct this issue later today)
The first step is to connect to external node to evaluate the code. When Tomislav originally wrote the extension, node response had parts in std output so additional hack was needed.
https://github.com/tgrospic/rholang-vscode/blob/master/src/rholang-server.ts#L258-L259
Additionally, work with private keys and be able to do deploys. Here are related issues.
tgrospic/rholang-vscode#2
tgrospic/rholang-vscode#10

Motivation/Impact/Importance:
Will improve development experience for all Rholang developers

Completion/Success Criteria:

Bonus points:

Link to specs and additional info :

Mentors:
Tomislav

Team :

Skills:

Judgment criteria:

Rchain Priority: