Expose Vanilla mob goal creation in the API

Is your feature request related to a problem?

I have never used the Mob Goal API before, and I wanted to convert a plugin, which used NMS to achieve this, to the API. In the plugin, there following code was present:

// 'this' is a nms Wolf.
this.goalSelector.addGoal(1, new FloatGoal(this));
this.goalSelector.addGoal(2, new LookAtPlayerGoal(this, Player.class, 8.0F));
this.goalSelector.addGoal(6, new FollowOwnerGoal(this, 1.4D, 3.0F, 1.5F));

So I went ahead, found myself the VanillaGoal interface, and wanted to start with a float goal... and.... nothing. Apparently you cannot create Vanilla goals, only remove or get them from mobs.

Describe the solution you'd like.

I would like the Mob Goal API to be expanded to properly to support creating a Goal<A> from a VanillaGoal<A>.
This could look like this:

Wolf wolf = ...;

Goal<Wolf> floatGoal = VanillaGoal.FLOAT.create(wolf); // This goal has no parameters, so you can just create it.
Goal<Wolf> followOwnerGoal = VanillaGoal.FOLLOW_OWNER.builder(wolf) // Goals which need extra parameters would have a builder.
    .speedModifier(1.4)
    .startDistance(3.0f)
    .stopDistance(1.5f)
    .build();
Goal<Wolf> lookAtPlayerGoal = VanillaGoal.LOOK_AT_PLAYER.builder(wolf)
    .lookAtType(Player.class)
    .lookDistance(8.0f)
    .build();

Describe alternatives you've considered.

With the use of NMS.

Other

No response

Start by locating the VanillaGoal interface and its existing get/remove API, then compare those entry points with the Java goal examples in the issue. The work is done when the API supports creating both parameterless and parameterized vanilla goals, with the proposed behavior or an agreed alternative documented by tests.