Felupe

Added
- Add Jupyter-Notebook argument to `View.plot(notebook=False)`, which passes the notebook-argument to the pyvista-plotter.

Changed
- Only set a theme for pyvista if the theme-argument is given, i.e. don't call `pv.set_plot_theme(theme)` if the theme-argument is None `View(field).plot(theme=None)`.

Added
- Add `ViewSolid`, which enables `view = ViewSolid(field, solid=None)` the view of cauchy stresses, e.g. `view.plot("Principal Values of Cauchy Stress").show()`.
- Add constitutive models to top-level namespace, e.g. `yeoh()` from `constitution.yeoh()`. This makes typing hyperelastic material formulations shorter: `Hyperelastic(yeoh, C10=0.5, C20=-0.1, C30=0.02)`.
- Add `CharacteristicCurve.plot(swapaxes=False)`.
- Add `MaterialAD`: A user-defined material definition with Automatic Differentiation. Only the first Piola-Kirchhoff stress tensor must be provided.

Changed
- Add optional point- and cell-data args for `ViewMesh(mesh, point_data=None, cell_data=None)` like already implemented in `ViewField`.
- Enforce contiguous arrays in `UserMaterialHyperelastic` (enhance performance).
- `View`: Switch from `ViewField` to `ViewSolid`.
- `View`: Always plot the undeformed mesh with `opacity=0.2` and `show_edges=False`.
- Rename `UserMaterial` to `Material`, `UserMaterialStrain` to `MaterialStrain`, `UserMaterialHyperelastic` to `Hyperelastic` (keep old alias names until next major release).
- Use consistent indices in `einsum()` for (elementwise operating) trailing axes: `q` for quadrature point and `c` for cell.
- Rename internal `IntegralFormMixed` to `IntegralForm`, which is now consistent internally and in the top-level namespace. The previous internal base-class for a single-field `IntegralForm` is renamed to `WeakForm`.
- Don't plot x- and y-labels in `CharacteristicCurve.plot(xlabel=None, ylabel=None)` if they are not specified.

Fixed
- Don't warp the mesh in `ViewMesh.plot()`.
- Warp the mesh in case no name is passed in `View.plot(name=None)`.
- Don't modify a given label in `Scene.plot(label=None)`.
- Fix the second invariant of the distortional part of the right Cauchy-Green deformation tensor in hyperelastic material formulations using tensortrax, i.e. fix the implementations of `mooney_rivlin()`, `third_order_deformation()` and `van_der_waals()`.

Removed
- Remove internal (unused) imports of the assembly submodule.

Changed
- Change the logo.

Added
- Add `ViewMesh(mesh)` and rebase `View` (internally renamed to `ViewField`) on `ViewMesh` with additional point- and cell-data.

Changed
- Change `math.linsteps(axis=None, axes=None)` to create optional multi-column arrays, where the steps are inserted at the given `axis`.
- Make last `gravity` and `density` arguments of `SolidBodyGravity(field, gravity=None, density=1.0)` optional.

Changed
- Show a progress bar during `Job.evaluate(verbose=True)` (new optional dependency `tqdm`). The legacy detailed output is available with `Job.evaluate(verbose=2)`.

Removed
- Remove config files for MyBinder. They are now located in a different repository [adtzlr/felupe-web](https://github.com/adtzlr/felupe-web).