refactor(editor): Color palette updates, introduce dark mode (#6980)

Github issue / Community forum post (link here to close automatically):

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Co-authored-by: Mutasem <mutdmour@gmail.com>

packages/editor-ui/src/components/ExpressionEditorModal/theme.ts

@@ -18,6 +18,7 @@ const commonThemeProps = {
 		height: '220px',
 		padding: 'var(--spacing-xs)',
 		color: 'var(--input-font-color, var(--color-text-dark))',
+		caretColor: 'var(--color-code-caret)',
 	},
 	'.cm-line': {
 		padding: '0',