Improvement/artesca 6419 initial http agent wrapper

[williamlardier]

Introduces Arsenal-Networking, as a centralized way to enforce common networking configuration across our components.

First commit: creating the project configuration files, including prettier, to enforce code style.
Second commit: initializing the project (typescript) with required dependencies.
Third commit: adding the abstraction layer for the http(s) Agent classes, to enforce the TCP connection reuse, as keepAlive alone is not enough in case of high load, as maxSockets is, by default, equal to Infinity.
Last commit: Adding a simple test workflow to ensure that the project builds and pass syntax checks.

[francoisferrand]

• How does this differ from agentkeepalive (which we use in some parts of the code only) ? Would be better if don't need to reinvent the wheel
• In any case, this repo should be renamed (before it becomes more complicated, as the repo would be used) : either it is a separate component, and it should not be named "arsenal" ; or it is part of arsenal and it should then stay in that repo...

[ghost]

lgtm

[williamlardier]

Post discussion with @francoisferrand , we'll reduce the scope of the repo to only HTTP Agents for now, and rename the repository to httpagent to make it clear.
This repository will introduce a bit more than something like agentkeepalive because we also enforce scality-specific environment variables for the configuration.