fix(interface): visual improvements for panels, bars, sizing and more

apps/web/src/app/app.tsx

...onents/navbar/DatabaseManagement/dbConnectionSelector.tsx

apps/web/src/components/navbar/navbar.tsx

apps/web/src/main.css

libs/config/tailwind.config.js

libs/shared/lib/components/color-mode/index.tsx

libs/shared/lib/querybuilder/panel/querybuilder.tsx

libs/shared/lib/schema/panel/schema.tsx

libs/shared/lib/sidebar/index.tsx

libs/shared/lib/vis/components/bar.tsx

libs/shared/lib/vis/components/config/panel.tsx

libs/shared/lib/vis/components/panel.tsx

libs/shared/lib/vis/visualizations/rawjsonvis/rawjsonvis.tsx