feat: tooltip, popover, and context menu style improvements

.storybook/main.ts

.storybook/preview.tsx

src/app/navbar/navbar.tsx

.../components/VisualizationTooltip/VisualizationTooltip.tsx

src/lib/components/VisualizationTooltip/index.tsx

src/lib/components/charts/barplot/index.tsx

src/lib/components/charts/heatmap1D/index.tsx

src/lib/components/charts/indicatorGraph/index.tsx

src/lib/components/color-mode/index.tsx

src/lib/components/dropdowns/index.tsx

src/lib/components/forms/index.tsx

src/lib/components/index.ts

src/lib/components/inputs/DropdownInput.tsx

src/lib/components/inputs/NumberInput.tsx

src/lib/components/inputs/TextInput.tsx

src/lib/components/nodeDetails/NodeDetails.stories.tsx

src/lib/components/nodeDetails/NodeDetails.tsx

src/lib/components/nodeDetails/index.tsx

src/lib/components/popover/Popover.tsx

src/lib/components/popover/PopoverProvider.tsx