finish migrations, add legacy shared library, update templates

district/blocks.py

.../migrations/0068_districtelectioncampaignpage_and_more.py

district/migrations/0218_auto_20240601_1530.py

...19_alter_districtelectioncampaignpage_options_and_more.py

district/models.py

...plates/district/district_geo_feature_collection_page.html

donate/blocks.py

donate/constants.py

donate/migrations/0047_alter_donatehomepage_menu.py

donate/migrations/0048_alter_donatehomepage_menu.py

donate/models.py

elections/migrations/0037_alter_electionshomepage_content.py

main/migrations/0094_alter_mainprogrampage_program.py

majak/settings/base.py

shared/static/styleguide2/main.css

shared/static/styleguide2/pirati-ui.svg

...ates/styleguide2/includes/atoms/buttons/round_button.html

...plates/styleguide2/includes/molecules/menus/carousel.html

...2/includes/organisms/main_section/newsletter_section.html

...udes/organisms/main_section/small_newsletter_section.html