Cleanup requirements used for building documentation (#44)

* Cleanup requirements used for building documentation

* Fix modules list on the main doc page

Author: Adakar

docs/index.md

@@ -16,6 +16,7 @@ pip install squape
 
 ### Content
 The package consists of several modules:
+
 - object_tree - seamless object tree navigation and search capabilities
 - report - adds features to enhance the reporting capabilities of Squish
 - settings - makes using various test settings easier and cleaner

requirements.txt

@@ -1,29 +1,5 @@
 pre-commit
-click==8.1.3
-colorama==0.4.5
-ghp-import==2.1.0
-griffe==0.22.0
-importlib-metadata==4.12.0
-Jinja2==3.1.2
-Markdown==3.3.7
-MarkupSafe==2.1.1
-mergedeep==1.3.4
-mkdocs==1.3.1
-mkdocs-autorefs==0.4.1
-mkdocs-gen-files==0.3.5
-mkdocs-literate-nav==0.4.1
-mkdocs-material==8.3.9
-mkdocs-material-extensions==1.0.3
-mkdocs-section-index==0.3.4
-mkdocstrings==0.19.0
-mkdocstrings-python==0.7.1
-packaging==21.3
-Pygments==2.12.0
-pymdown-extensions==9.5
-pyparsing==3.0.9
-python-dateutil==2.8.2
-PyYAML==6.0
-pyyaml_env_tag==0.1
-six==1.16.0
-watchdog==2.1.9
-zipp==3.8.1
+mkdocs
+mkdocs-material
+mkdocs-section-index
+mkdocstrings-python