Adding a parameter in config to be able to disable link force

[antoninklopp]

Adding feature discussed in #274

The example below is the one described in the doc as small sample config statically positioned nodes.. However, if we take a look at the picture below, the nodes are not positioned as the user would like since the node config states :

{
            id: 3,
            name: "C",
            x: 400,
            y: 100,
        },
        {
            id: 4,
            name: "D",
            x: 400,
            y: 200,
        },

And we can see that C and D or not vertically aligned but they should because they have the same x coordinate.
The option fixes this behavior.

With disableLinkForce=false, before code change:

With disableLinkForce=true, with option after code change:

I added this option in the static data config, since it's more closer to what the description of the data says.

[antoninklopp]

The two blank lines in in the documentation are added because of the pre-commit hooks.

[danielcaldas]

The results look awesome! Thank you so much for the contribution @antoninklopp. I'm still unsure on how to communicate this feature, I'll probably tag this as experimental on the next release, to see how developers react to it.