[material][SimpleCO2] fix enthalpy calculation

See merge request !3457

BrineCO2 fluidsystem and Brine_CO2 binarycoefficients focus on supercritical CO2

Add warning amgbackend.hh will be removed after 3.7

See merge request !3454

Feature/update and clean examples

See merge request !3438

Cleanup/embedded example

Closes #1194

See merge request !3456

[handbook] Update to 3.7, update discretization images and some text.

See merge request !3444

[doxygen] Add filter to convert GitLab math to doxygen math in markdown

See merge request !3452

[examples][1d3d] Fix math typo

See merge request !3451

[doxygen][header] Fix page overflow with gitlab corner

See merge request !3449

[assembly] Use unified Jacbian sparsity pattern computation for CVFE methods

See merge request !3447

[md][assembly] Unify coupling Jacobian pattern for cvfe schmes

See merge request !3445

[ff][velocityoutput] Enable velocity output for all CVFE schemes

See merge request !3443

Add SimpleCO2 component

Closes #1162

See merge request !3433

[Example][Biomin] Adjust to new CO2 components

[examples][biomineralization] Use new SimpleCO2 component

[Example][Biomin][SimpleCO2] removed co2tables and their mention in the Readme

[Example][Biomin][SimpleCO2] fixup documentation files

[examples][biomin] Improve documentation

[Components][CO2] Pass implementation instead of co2table

[fluidsystem][brineco2] deprecate passing CO2Tables

[material][binarycoefficients] deprecate passing CO2Tables

[material] Remove unnecessary use of namespaces

[material] Add missing headers

[material] Add missing headers