add information for providers

docs/images/architecture_1.png

docs/images/architecture_2.png

docs/images/architecture_3.png

docs/images/architecture_4.png

docs/images/sharebutton_2.png

docs/providers/architecture.md

docs/providers/configuration.md

docs/providers/index.md

docs/providers/installation.md

docs/providers/installation_including_local_unused.md

mkdocs.yml