DOMParser parseFromString should not decode entities inside script tags

[jrenjilian]

Describe the bug
Script and style tags don't decode HTML entities, so myScript.textContent should contain < etc if present. This appears to work when creating a script element through document.createElement, but not when using new DOMParser().parseFromString.

To Reproduce

import { Window } from "happy-dom";

const window = new Window();

console.log(
  new window.DOMParser()
    .parseFromString(
      "<script>&lt;span&gt;Hello&lt;/span&gt;</script>",
      "text/html"
    )
    .querySelector("script")
    .textContent
);

// Result: <span>Hello</span>
// Expected: &lt;span&gt;Hello&lt;/span&gt;

(Running the above in a browser, skipping the happy-dom setup, gives the expected result)

Expected behavior
HTML entities are not decoded by textContent when used inside a script tag in new DOMParser().parseFromString.

Device:

• OS: macOS 14.6.1
• Browser: N/A
• Version: happy-dom 15.7.3, also tried 14.12.3 which had the same issue; Node 22.2.0

Additional context
I ran into this when embedding data containing HTML entities into documents with <script type="application/json">.