Add l-system dsl about parametric-l-systems

[JolifantoBambla]

the code above corresponds to:

{
  systems: {
    tree: {
      alphabet: ['~D(i)', <...turtle3dCommands>],
      parameters: { r1: 0.0 },
      productions: ['1.0; _ < F(w,l) > _: _ -> ~D(w)'],
      axiom: 'A(100, w0)'
    },
  },
  instances: {
    x: {...},
  },
  scene: {
    materials: [{ color: [...] },],
    lights: {
      ambient: { color: [...]},
      pointLights: [{...},{...}],
    },
    objects: [
       {x, transform: [...]}
    ],
    surfaces: {
      D: {
         alphabet: ['X(x), <...surfaceCommands>],
         parameters: [...],
         productions: [...],
         axiom: '',
         transform: [...],
      }
    },
   objs: {
      X: { path: '...' }
   }
  }

[JolifantoBambla]

or just leave it as a json and be done with it