Add a remark plugin to support custom header id

Allows validation of custom headers via remark-validate-links

.remarkrc.mjs

@@ -1,10 +1,12 @@
+import remarkHeadingId from "remark-heading-id";
 import remarkValidateLinks from "remark-validate-links";
 import remarkFrontmatter from "remark-frontmatter";
 import remarkLintFrontmatterSchema from "remark-lint-frontmatter-schema";
 import remarkLintNoDeadUrls from "remark-lint-no-dead-urls";
 
 const remarkConfig = {
 	plugins: [
+		remarkHeadingId,
 		remarkValidateLinks,
 		remarkFrontmatter,
 		[

package.json

@@ -14,6 +14,7 @@
   "devDependencies": {
     "remark-cli": "^10.0.1",
     "remark-frontmatter": "4.0.1",
+    "remark-heading-id": "^1.0.1",
     "remark-lint-frontmatter-schema": "^3.15.2",
     "remark-lint-no-dead-urls": "^1.1.0",
     "remark-validate-links": "^11.0.2"

yarn.lock

@@ -6781,6 +6781,7 @@ __metadata:
     react-dom: ^17.0.2
     remark-cli: ^10.0.1
     remark-frontmatter: 4.0.1
+    remark-heading-id: ^1.0.1
     remark-lint-frontmatter-schema: ^3.15.2
     remark-lint-no-dead-urls: ^1.1.0
     remark-validate-links: ^11.0.2
@@ -17527,6 +17528,16 @@ __metadata:
   languageName: node
   linkType: hard
 
+"remark-heading-id@npm:^1.0.1":
+  version: 1.0.1
+  resolution: "remark-heading-id@npm:1.0.1"
+  dependencies:
+    lodash: ^4.17.21
+    unist-util-visit: ^1.4.0
+  checksum: 20fd8072436280936dd76cf3a86d3e8e4f89bb4440863ea67d5c2ad27b74e858350aaf5a56a292bdb7f99c28fa823a83d8cfac87bfc410ebb39d23594d5905d8
+  languageName: node
+  linkType: hard
+
 "remark-lint-frontmatter-schema@npm:^3.15.2":
   version: 3.15.2
   resolution: "remark-lint-frontmatter-schema@npm:3.15.2"
@@ -20410,7 +20421,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"unist-util-visit@npm:^1.0.0, unist-util-visit@npm:^1.1.0, unist-util-visit@npm:^1.4.1":
+"unist-util-visit@npm:^1.0.0, unist-util-visit@npm:^1.1.0, unist-util-visit@npm:^1.4.0, unist-util-visit@npm:^1.4.1":
   version: 1.4.1
   resolution: "unist-util-visit@npm:1.4.1"
   dependencies: