feat 🥁: add no-zero-unit rule

src/css-rules/no-zero-unit/rule-definition.ts

@@ -0,0 +1,23 @@
+import type { Rule } from 'eslint';
+import { createZeroUnitVisitors } from './zero-unit-visitor-creator.js';
+
+const noZeroUnitRule: Rule.RuleModule = {
+  meta: {
+    type: 'suggestion',
+    docs: {
+      description: 'enforce unitless zero in numeric values',
+      category: 'Stylistic Issues',
+      recommended: true,
+    },
+    fixable: 'code',
+    schema: [],
+    messages: {
+      noZeroUnit: 'Unit with zero value is unnecessary. Use 0 instead.',
+    },
+  },
+  create(context) {
+    return createZeroUnitVisitors(context);
+  },
+};
+
+export default noZeroUnitRule;