Storybook: Add stories for the contrast-checker component

packages/block-editor/src/components/contrast-checker/stories/index.story.js

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+/**
+ * Internal dependencies
+ */
+import ContrastChecker from '../';
+
+const meta = {
+	title: 'BlockEditor/ContrastChecker',
+	component: ContrastChecker,
+	parameters: {
+		docs: {
+			canvas: { sourceState: 'shown' },
+			description: {
+				component:
+					'Determines if contrast for text styles is sufficient (WCAG 2.0 AA) when used with a given background color.',
+			},
+		},
+	},
+	argTypes: {
+		backgroundColor: {
+			control: 'color',
+			description:
+				'The background color to check the contrast of text against.',
+			table: {
+				type: {
+					summary: 'string',
+				},
+			},
+		},
+		fallbackBackgroundColor: {
+			control: 'color',
+			description:
+				'A fallback background color value, in case `backgroundColor` is not available.',
+			table: {
+				type: {
+					summary: 'string',
+				},
+			},
+		},
+		textColor: {
+			control: 'color',
+			description:
+				'The text color to check the contrast of the background against.',
+			table: {
+				type: {
+					summary: 'string',
+				},
+			},
+		},
+		fallbackTextColor: {
+			control: 'color',
+			description:
+				'A fallback text color value, in case `textColor` is not available.',
+			table: {
+				type: {
+					summary: 'string',
+				},
+			},
+		},
+		fontSize: {
+			control: 'number',
+			description:
+				'The font-size (as a `px` value) of the text to check the contrast against.',
+			table: {
+				type: {
+					summary: 'number',
+				},
+			},
+		},
+		isLargeText: {
+			control: 'boolean',
+			description:
+				'Whether the text is large (approximately `24px` or higher).',
+			table: {
+				type: {
+					summary: 'boolean',
+				},
+			},
+		},
+		linkColor: {
+			control: 'color',
+			description: 'The link color to check the contrast against.',
+			table: {
+				type: {
+					summary: 'string',
+				},
+			},
+		},
+		fallbackLinkColor: {
+			control: 'color',
+			description: 'Fallback link color if linkColor is not available.',
+			table: {
+				type: {
+					summary: 'string',
+				},
+			},
+		},
+		enableAlphaChecker: {
+			control: 'boolean',
+			description: 'Whether to enable checking for transparent colors.',
+			table: {
+				type: {
+					summary: 'boolean',
+				},
+			},
+		},
+	},
+};
+
+export default meta;
+
+export const Default = {};