`Feature`: Create an API Interface

[gyptazy]

General

It would be cool to have an API Interface providing multiple different endpoints and returning JSON content for further parsing. Therefore, it would great to obtain the best optimal new node for placing new VMs (which could be easily used by Ansible, Terraform etc.,) and also providing the current and planned statistics of nodes and VMs.

It should at least contain the following ones:

Option	Endpoint
Best new node	/cluster/placement/nextnode
Current VM overview	/cluster/placement/statistics/current/vms
Current Node overview	/cluster/placement/statistics/current/nodes
Rebalanced VM overview	/cluster/placement/statistics/rebalanced/vms
Rebalanced Node overview	/cluster/placement/statistics/rebalanced/nodes

Tasks

• Validate for dependencies
• Integrate web server
• Integrate API Endpoints
• API should be optional (should also run without and without dependencies)

[gyptazy]

Instead of creating an own API interface by using http.server and doing everything on my own, I probably should consider switching to a framework which might offer more benefits and also a better maintenance in long-term.

I closed the idea PR with the old solution and will stick with a framework solution after releasing version 1.0.0.