perf: remove usage of html-validator dependency

Allows to have better control of the implementation.
Also reduce package size by removing needed dependencies to install.

example/package-lock.json

@@ -19,7 +19,6 @@
       "dependencies": {
         "chalk": "5.3.0",
         "clipanion": "3.2.1",
-        "html-validator": "6.0.1",
         "log-symbols": "6.0.0",
         "ora": "8.0.1",
         "read-pkg": "9.0.1",
@@ -34,7 +33,6 @@
         "@swc/cli": "0.3.6",
         "@swc/core": "1.3.107",
         "@tsconfig/strictest": "2.0.2",
-        "@types/html-validator": "5.0.6",
         "@types/node": "20.11.16",
         "@types/sinon": "17.0.3",
         "@typescript-eslint/eslint-plugin": "6.20.0",