feat: add code highlighter (#12)

* feat: add code highlighter

* feat: add simple default css

Author: ryuapp

deno.json

@@ -23,7 +23,9 @@
     "@std/front-matter": "jsr:@std/front-matter@^1.0.5",
     "@std/path": "jsr:@std/path@^1.0.8",
     "@std/yaml": "jsr:@std/yaml@^1.0.5",
-    "md4w": "npm:md4w@^0.2.6"
+    "md4w": "npm:md4w@^0.2.6",
+    "node-html-parser": "npm:node-html-parser@^7.0.1",
+    "shiki": "npm:shiki@^1.26.1"
   },
   "exclude": [".gitattributes", ".github", "src/testdata", "**/*/*_test.ts"]
 }

deno.lock

@@ -21,7 +21,7 @@ export async function mdToPdf(
 
   const browser = await launch();
   const page = await browser.newPage(`http://localhost:${server.addr.port}`);
-  const pdf = await page.pdf();
+  const pdf = await page.pdf({ printBackground: true });
 
   // Close the browser and the server
   await browser.close();