chore(website): Fixing getting started and typography pages - FRONT-3925

[planctus]

This is fixing the getting started and typography (guildelines) pages in the website.
Additionally this brings back the sri hashes in the getting started pages that were not working since we moved to github actions.
Unfortunately there is no "preview" where to see this working, but this is the html snippet in the getting started page where the values are correctly appearing:

<details>
  <summary>SRI hashes (click to expand)</summary>
  <ul>
    <li>
      <p class="iRCJJeCgSXzX9ymLg1TH">for <code>ecl-ec.css</code>: <code>sha256-MMxHrF78tyV3pNw5vfltXI4IZVabHRY5jRELJIh2lPw= sha384-x8P09uLwQRW5qOL5KhANn7+4NNd/DipzqVr7a+lw35ctzM6q+ZcAw8aV+7i2yUQ6 sha512-6zw2Q1ofY5ubR7kHOmEvXAczQXhqhdUTijoAFJ2HNorvSm3ffv6LSRntFSZefkFykeTx7Y1/9i7nmIpiE1y4WA==</code></p>
    </li>
    <li>
      <p class="iRCJJeCgSXzX9ymLg1TH">for <code>ecl-ec-print.css</code>: <code>sha256-iyjrNR7nWBaRE4y4d/0ajFW8XSLc2PLKyp7oi5UJTc8= sha384-fm3Tv3I5fMaFSoRkuCHq9431bh8aBbMZqxUeK2Ddl1gNR/xKiWhAlwKvUH3UE4Tr sha512-zJtE50tnON31NkK/foqnB/QHoE+P1eRyyw/hLylDk+qkCiixa3Rqo1/36Cj7lkNHfaqgQW9uF0vncadzTHVWwA==</code></p>
    </li>
    <li>
      <p class="iRCJJeCgSXzX9ymLg1TH">for <code>ecl-ec.js</code>: <code>sha256-12rwLoYVQoH8tAhY4hP5ujCt7KV3q8mwbD2vUJLQNZw= sha384-C7XQ614XmUQLMpcA+PY6ARzb1lIQ3/23oRAJtH8aKNmpLpwlyAblJ5LgaHcqYvji sha512-3NWcC9iBbT8j5h8Au4ed5wE55i/IDyhXpRCbaVl8IEYjhnhWJhiGU1A939oCuWYiJdY3sT4BhHRGJKOVt6IyMA==</code></p>
    </li>
  </ul>
</details>
<h3 class="hP0JRBIVst5iIYxPqP2U">Optional styles</h3>
<p class="iRCJJeCgSXzX9ymLg1TH">There are several optional CSS files, located in <code>ec/styles/optional</code>, which can be included in your site on not, depending on the needs.<br><strong>These optional CSS have to be called before the main ECL CSS</strong></p>
<ul class="ByrPMdX6Jirc6n7gjlSw">
  <li><code>ecl-reset.css</code>: contains some css reset rules, mostly based on normalize.css, with a few custom additions</li>
  <li><code>ecl-ec-default.css</code>: apply ECL styling to some default HTML tags (links, buttons, table, ...). Note that this file is meant to be used in specific cases, the recommanded way to use ECL is still to add corresponding classes to HTML elements. A corresponding print css <code>ecl-ec-default-print</code> is also provided.</li>
</ul>
<details>
  <summary>SRI hashes for optional files (click to expand)</summary>
  <ul>
    <li>
      <p class="iRCJJeCgSXzX9ymLg1TH">for <code>ecl-reset.css</code>: <code>sha256-cPUMy3L4h9wyowuxz4QPTwOEN1b6cVCv9OGaauPAy0I= sha384-gF70AzWQToXLH7rj6l7wfSo0Dyaw7vVmukjSKx2Pfxc2hwixbml2cyYQ3k5b5ZPv sha512-yFOdkghA4EHwl6kkVJvNCX1P8YroisJ3xqSaSrI3oWGWdx1fRNTHSiLfhfX1zoJ5fuGb1x2teYKOFYujH43v8g==</code></p>
    </li>
    <li>
      <p class="iRCJJeCgSXzX9ymLg1TH">for <code>ecl-ec-default.css</code>: <code>sha256-JIzC26dxbCNqVQQiwX/9v+a/drHRF9wmU6FwR8XlgTo= sha384-uEo9p/lhgp/+M02/8VZUVItsPvK90xaSc+jajjLSs7PaCigjOYoL9jPFBnMnyWv7 sha512-u77F0DL9uLBtXIeCuJYJXDKUNL3qsA4S0wNL3CAPxsyCrYNqjQcJr3egekkzJPq54zKZGikNIZhOJyCpNWsptg==</code></p>
    </li>
  </ul>
</details>

The sri file is generated in scripts and then moved during the website build in dist/packages, it is correctly deployed to github as it can be seen here:
https://github.com/ec-europa/europa-component-library/releases/tag/v3-test-sri

[github-actions]

🚀 Deployed on https://ecl-preview-2832--europa-component-library.netlify.app

[HAL-Patch-INNO]

testing review_id