feat: implement autofix for md029

Add support for auto-fixing MD029 violations.

Close #949

test/markdownlint-test.mjs

@@ -912,7 +912,7 @@ test("readme", async(t) => {
 });
 
 test("validateJsonUsingConfigSchemaStrict", async(t) => {
-  t.plan(209);
+  t.plan(211);
   // @ts-ignore
   const ajv = new Ajv(ajvOptions);
   const validateSchemaStrict = ajv.compile(configSchemaStrict);

test/ordered-list-item-prefix-double-digits-ordered.md

@@ -0,0 +1,42 @@
+# Ordered list examples
+
+Good list:
+
+1. Item
+2. Item
+3. Item
+4. Item
+5. Item
+6. Item
+7. Item
+8. Item
+9. Item
+10. Item
+11. Item
+
+Bad list 1:
+
+1. Item
+10. Item {MD029}
+9. Item {MD029}
+
+Bad list 2:
+
+11. Item {MD029}
+10. Item {MD029}
+
+Bad list 3
+
+12. Item {MD029}
+1. Item {MD029}
+
+Bad list 4:
+
+0. Item
+10. Item {MD029}
+
+<!-- markdownlint-configure-file {
+  "ol-prefix": {
+    "style": "ordered"
+  }
+} -->

test/ordered-list-item-prefix-sublists-ordered.md

@@ -0,0 +1,47 @@
+# Ordered list examples
+
+Good list and sublist:
+
+1. Item
+2. Item
+    1. Item
+    2. Item
+3. Item
+
+Good list and bad sublist:
+
+1. Item
+2. Item
+    3. Item
+    4. Item
+3. Item
+
+Bad list and good sublist:
+
+1. Item
+4. Item {MD029}
+    1. Item
+    2. Item
+5. Item {MD029}
+
+Bad list and bad sublist:
+
+1. Item
+4. Item {MD029}
+    1. Item
+    3. Item {MD029}
+5. Item {MD029}
+
+Bad list and bad sublist (0):
+
+0. Item
+4. Item {MD029}
+    1. Item
+    3. Item {MD029}
+5. Item {MD029}
+
+<!-- markdownlint-configure-file {
+  "ol-prefix": {
+    "style": "ordered"
+  }
+} -->