Replace Sphinx with MkDocs

build-docs.sh

docs/overrides/partials/logo.html

docs/scripts/gen_ref_pages.py

docs/source/Makefile

docs/source/conf.py

docs/source/glossary.rst

docs/source/index.rst

docs/source/module/api/index.rst

docs/source/module/api/v1/index.rst

docs/source/module/api/v1/network.rst

docs/source/module/api/v1/subscriptions.rst

docs/source/module/auth/api_key_auth.rst

docs/source/module/auth/index.rst

docs/source/module/auth/oidc.rst

docs/source/module/auth/opa.rst

docs/source/module/cli/imports.rst

docs/source/module/cli/index.rst

docs/source/module/cli/netbox.rst

docs/source/module/products/index.rst

docs/source/module/products/product_blocks/bgp_session.rst