started work on Nástěnka styles

majak_uistyleguide/settings/base.py

...ide/templates/patterns/atoms/nastenka/sidebar_button.html

...ide/templates/patterns/atoms/nastenka/sidebar_button.yaml

...guide/templates/patterns/templates/nastenka/nastenka.html

majak_uistyleguide/templatetags/__init__.py

majak_uistyleguide/templatetags/random.py

package-lock.json

package.json

src/js/main.js