feat: add remark widont extension

Idea from this article: https://eatmon.co/blog/remove-runts-markdown/

src/utils/index.ts

@@ -2,6 +2,7 @@ export * from './date';
 export * from './format-posts';
 export * from './pick-two-random-colors';
 export * from './remark-reading-time';
+export * from './remark-widont';
 export * from './sort-by-alphabet';
 export * from './sort-by-date';
 export * from './sort-by-sortkey';

src/utils/remark-widont.ts

@@ -0,0 +1,17 @@
+import { visit } from 'unist-util-visit';
+
+import type { Literal, Node } from 'unist';
+
+export function remarkWidont() {
+	function transformer(tree: Node) {
+		visit(tree, 'text', function (node: Literal<string>) {
+			let wordCount = node.value.split(' ').length;
+
+			if (wordCount >= 3) {
+				node.value = node.value.replace(/ ([^ ]*)$/, '\u00A0$1');
+			}
+		});
+	}
+
+	return transformer;
+}