feat(maps_utils): add support for map embedding as well as map collection on district

.isort.cfg

...ons/0062_districtgeofeaturecollectioncategory_and_more.py

...rict/migrations/0063_alter_districtarticlepage_content.py

...64_alter_districtgeofeaturedetailpage_options_and_more.py

district/models.py

...plates/district/district_geo_feature_collection_page.html

.../templates/district/district_geo_feature_detail_page.html

majak/settings/base.py

majak/urls.py

maps_utils/__init__.py

maps_utils/apps.py

maps_utils/blocks.py

maps_utils/const.py

maps_utils/static/maps_utils/geo-feature-collection.css

maps_utils/static/maps_utils/geo-feature-collection.js

maps_utils/static/marker-numbered.svg

maps_utils/static/marker.svg

...s/templates/maps_utils/blocks/map_feature_collection.html

maps_utils/templates/maps_utils/blocks/map_point.html

maps_utils/templates/maps_utils/marker-numbered.svg.template