Expose shorthand properties reference as public API

The type definition is generated by the following script:

```js
const shorthandData = require("./lib/reference/shorthandData")
console.log('export type ShorthandData = {')
for (const key of Object.keys(shorthandData)) {
	console.log(`\t'${key}': Set<string>;`)
}
console.log('};')
```

lib/index.js

@@ -6,11 +6,12 @@ const createStylelint = require('./createStylelint');
 const formatters = require('./formatters');
 const postcssPlugin = require('./postcssPlugin');
 const report = require('./utils/report');
+const resolveConfig = require('./resolveConfig');
 const ruleMessages = require('./utils/ruleMessages');
 const rules = require('./rules');
+const shorthandData = require('./reference/shorthandData');
 const standalone = require('./standalone');
 const validateOptions = require('./utils/validateOptions');
-const resolveConfig = require('./resolveConfig');
 
 /** @type {import('stylelint').PublicApi} */
 const stylelint = Object.assign(postcssPlugin, {
@@ -26,6 +27,9 @@ const stylelint = Object.assign(postcssPlugin, {
 		validateOptions,
 		checkAgainstRule,
 	},
+	reference: {
+		shorthandData,
+	},
 });
 
 module.exports = stylelint;

types/stylelint/index.d.ts

@@ -379,6 +379,44 @@ declare module 'stylelint' {
 			line?: number;
 		};
 
+		export type ShorthandData = {
+			margin: Set<string>;
+			padding: Set<string>;
+			background: Set<string>;
+			font: Set<string>;
+			border: Set<string>;
+			'border-top': Set<string>;
+			'border-bottom': Set<string>;
+			'border-left': Set<string>;
+			'border-right': Set<string>;
+			'border-width': Set<string>;
+			'border-style': Set<string>;
+			'border-color': Set<string>;
+			'list-style': Set<string>;
+			'border-radius': Set<string>;
+			transition: Set<string>;
+			animation: Set<string>;
+			'border-block-end': Set<string>;
+			'border-block-start': Set<string>;
+			'border-image': Set<string>;
+			'border-inline-end': Set<string>;
+			'border-inline-start': Set<string>;
+			'column-rule': Set<string>;
+			columns: Set<string>;
+			flex: Set<string>;
+			'flex-flow': Set<string>;
+			grid: Set<string>;
+			'grid-area': Set<string>;
+			'grid-column': Set<string>;
+			'grid-gap': Set<string>;
+			'grid-row': Set<string>;
+			'grid-template': Set<string>;
+			outline: Set<string>;
+			'text-decoration': Set<string>;
+			'text-emphasis': Set<string>;
+			mask: Set<string>;
+		};
+
 		export type PublicApi = PostCSS.PluginCreator<PostcssPluginOptions> & {
 			/**
 			 * Runs stylelint with the given options and returns a Promise that
@@ -455,6 +493,12 @@ declare module 'stylelint' {
 					callback: (warning: PostCSS.Warning) => void,
 				) => void;
 			};
+			reference: {
+				/**
+				 * Shorthand properties having longhand sub-properties.
+				 */
+				shorthandData: ShorthandData;
+			};
 		};
 
 		/**

types/stylelint/type-test.ts

@@ -131,3 +131,5 @@ messages.warning('some string');
 
 // @ts-expect-error Null is not allowed in `RuleMessageFunc` parameters.
 messages.warning(null);
+
+const shorthandSubProps: Set<string> = stylelint.reference.shorthandData['border-color'];