Benchmark reports

[segsell]

Use pytask and sphinx to create an auto-generated webpage with dynamically generated toctree that contains the following information:

• Profile and deviation plots
• Convergence report table
• Rank report table
• Tracebacks, grouped by scenario
• Convergence plots of all problems that have not been

To get back to the index page, simply click the left arrow at the bottom.

[timmens]

Note: We can access the index page by clicking the left arrow.

[janosg]

• We should not re-create the plots but simply copy them into the directory where we need them. Something like I do for the slides in my current PR.
• For each report (trancebacks, ranks, convergence), there should be a public function with a similar interface as the profile_plot and convergence_plot in estimagic. I.e. those functions take results and problems and internally call process_benchmark_results. Since we don't have time pressure, those functions can be moved to estimagic right away. Those functions should also have default values for parameters that are in line with the plotting functions. That way we can probably also have a more concise plot_config.