chore: add toc to mobile dropdown menu single items
chore: refactor sidebar
chore: add single layout for blog
chore: add vscode settings
chore: add blog section
chore: add devcontainer.json
chore: exclude icon from mobile nav
chore: support multiple theme switches
- simplify theme switch implementation using data attributes
- hide theme switch when sidebar is disabled
chore: add theme switch to footer
- enable when sidebar is disabled
chore: add format-date partial
