Support particle shape from data

Consider supporting ParticleShape3D class with positions defined in data file. So something like:

...
shape: ModelShape3D {
 source: "my_torus.cbor"
 random: false
}
... 

Some thoughts:

• Format could be CBOR similar to timeline binary keyframes. Just a set of QVector3D positions or something more (sizes, colors etc.)?
• Have "bool random" property which defines if positions are used randomly or in order of appearance. Supporting in-order gives possibility to sort the data so that emitting happens e.g. from top to bottom, from outside-in etc.
• What kind of helper app could we provide for generating the data? It could allow generating n amount of points from current shapes or a model mesh. Then as a second step it could allow ordering the data based on some direction & smoothing.
• Emitting from this kind of shape would be very fast compared to live calculation of positions from more complicated shape/model.