This MR publishes a first draft of the Beginner Guide.
It contains:
- introduction to project files
- description of blocks in project files
tutorial guiding new users through the whole simulation workflow (from mesh creating to postprocessing of data) Moved to !4457
- description of some more advanced features
To discuss:
1. Merging with already existing blocks and sections in the User Guide
Some content would fit nicely with existing pages (for example /docs/beginnerguide/project-file/project-file-intro is complementary with /docs/userguide/project-file). For now, all new content is placed in a separate folder (/docs/beginnerguide/), but at a later point, it may be a good idea to move parts of it to other places on the webpage. This was already done in commit bd914b77
TODO:
Add list of missing content This will be done in a separate MR in the future. !4450 (merged)