feat(ui): add Button, Modal, Spinner, Toast, and Tooltip components with styles

- Implemented Button component with various props for customization.
- Created Modal component with header, content, and footer subcomponents.
- Added Spinner component for loading indicators.
- Developed Toast component for displaying notifications.
- Introduced Tooltip component for contextual hints with keyboard shortcuts.
- Added corresponding CSS modules for styling each component.
- Updated index file to export new components.
- Configured TypeScript settings for the UI package.

packages/shared/src/components/voice/VoiceParticipantContextMenu.module.css

@@ -0,0 +1,28 @@
+.volumeRow {
+	display: flex;
+	flex-direction: column;
+	gap: 6px;
+	padding: 8px 8px 10px;
+}
+
+.volumeLabel {
+	display: flex;
+	align-items: center;
+	gap: 6px;
+	color: var(--text-secondary);
+	font-size: 0.8125rem;
+	font-weight: 500;
+}
+
+.volumeValue {
+	margin-left: auto;
+	color: var(--text-tertiary);
+	font-variant-numeric: tabular-nums;
+}
+
+.volumeSlider {
+	width: 100%;
+	height: 4px;
+	accent-color: var(--brand-primary);
+	cursor: pointer;
+}