chore: add link to docs in each eslint rule (#32)

Author: k-yle

src/rules/no-duplicate-imports.js

@@ -10,6 +10,7 @@ export default {
 		docs: {
 			description: "Disallow duplicate @import rules",
 			recommended: true,
+			url: "https://github.com/eslint/css/blob/main/docs/rules/no-duplicate-imports.md",
 		},
 
 		messages: {

src/rules/no-empty-blocks.js

@@ -10,6 +10,7 @@ export default {
 		docs: {
 			description: "Disallow empty blocks",
 			recommended: true,
+			url: "https://github.com/eslint/css/blob/main/docs/rules/no-empty-blocks.md",
 		},
 
 		messages: {

src/rules/no-invalid-at-rules.js

@@ -49,6 +49,7 @@ export default {
 		docs: {
 			description: "Disallow invalid at-rules",
 			recommended: true,
+			url: "https://github.com/eslint/css/blob/main/docs/rules/no-invalid-at-rules.md",
 		},
 
 		messages: {

src/rules/no-invalid-properties.js

@@ -21,6 +21,7 @@ export default {
 		docs: {
 			description: "Disallow invalid properties",
 			recommended: true,
+			url: "https://github.com/eslint/css/blob/main/docs/rules/no-invalid-properties.md",
 		},
 
 		messages: {