Add static mesh, new shapes and variable render resolution

[phohenberger]

• Add option for meshes to be static, meaning they will only be loaded in once and not changed during the following frames. This significantly improves rendering time for a larger non-moving mesh.
  Can be added to vis.Particle and vis.VectorField by simply giving them the static = True parameter.
  Note that static objects only take in position in the shape of (n_part, n_dim)
• Add 7 more mesh shapes. Box, Cone, Icosahedron, Octahedron, Tetrahedron, Torus and MobiusLoop
• Allow to choose the render resolution and samples per pixel for screenshots or exported videos. Default is resolution = [4096, 2160] and spp = 64

[SamTov]

Great PR! I have a few comments on the mesh objects I would like to discuss briefly. But overall it looks great.

On a second point, I think we can clean up the data flow in the visualiser and the renderer, however, I think this calls for a different PR so we can shelve that for now. Just check out my mesh comments and we can merge the PR.

[phohenberger]

I moved the mesh instantiation to the parent mesh-class. The child-classes now only need a create_mesh function which relies on the specific shape parameters. This reduces the repeated code significantly. What do you think @SamTov

[phohenberger]

Shapes like Arrow or CustomMesh are special cases and need to overwrite a function in the mesh parent-class. But i think this is still a good solution as they need to instantiate differently and that cannot be generalized.