Restyle the answers output of the Training Manual (#6535)

* css styles and js function for the new admonition tag

* [training manual] overview solutions and deleted answers

* better block extending in html

* add comments to the js function and to the css class

* add an example with a map

* Answers of the basic_map chapter

* Answers of the vector_classification chapter

* Answers of the create_vector_data chapter

* Answers of the vector_analysis chapter

* Answers of the raster chapter

* Answers of the complete_analysis chapter

* Answers of the online_resources chapter

* Answers of the grass chapter

* Answers of the database_concepts chapter

* Answers of the spatial_databases chapter

* bye bye answer chapter!

* fix some build problems

* Add sphinx_togglebutton extension to create collapsible admonitions

* Remove theme customization

* Apply dropdown class to answers admonitions

* Update docs/training_manual/basic_map/symbology.rst

Co-authored-by: Harrissou Sant-anna <delazj@gmail.com>

* Update docs/training_manual/create_vector_data/forms.rst

Co-authored-by: Harrissou Sant-anna <delazj@gmail.com>

* Update docs/training_manual/create_vector_data/topo_editing.rst

Co-authored-by: Harrissou Sant-anna <delazj@gmail.com>

* Update docs/training_manual/create_vector_data/topo_editing.rst

Co-authored-by: Harrissou Sant-anna <delazj@gmail.com>

* Apply suggestions from code review

Co-authored-by: Harrissou Sant-anna <delazj@gmail.com>

* Update docs/training_manual/basic_map/preparation.rst

Co-authored-by: Harrissou Sant-anna <delazj@gmail.com>

* Add label to the basic map

Co-authored-by: Harrissou Sant-anna <delazj@gmail.com>

REQUIREMENTS.txt

@@ -3,6 +3,7 @@ sphinx-intl
 sphinx_rtd_theme
 sphinx-intl[transifex]
 sphinxext-rediraffe
+sphinx_togglebutton
 transifex-client
 PyYAML
 pdflatex

conf.py

@@ -49,6 +49,7 @@
     'sphinx.ext.doctest',
     'sphinx.ext.extlinks',
     'sphinxext.rediraffe',
+    'sphinx_togglebutton',
 ]
 
 # Add any paths that contain templates here, relative to this directory.