[⚡e2e]: add ability to load starting snippet for testing

[ala-n]

Requirements:

1. Open an actual test page driven by an 11ty server
   Make sure we can access any page
   e.g. home page we have for scene tests right now

      Given a page "/"

   Make sure we can open a test page

      Given a page "/test/testpage"

   Test page requirements:

   1. All the test pages should be stored under test subpath / subfolder (site/views/test)
   2. Recommended to use the test layout for snippet test pages (create if not exist, based on an empty layout)
   3. It is absolutely critical to make sure that test pages are excluded from any indexes/collections (sitemap, navigation, etc)

2. (Optional)

   Given a snippet:
   """html
   <div>
        Bal bla bla <my-component></my-component>
   </div>
   """  

(syntax to be clarified)
So the test env automatically opens the empty page and inserts the provided markup

[fshovchko]

Couple of things to point out:

• (Off topic) our rule check if the screenshot is equal to the snapshoted version has threshold of .25, which is super big. I tried deleting a header from our landing page and test still passed. The test started to fail only on threshold of .02
• I tried to implement a snippet rule. But apparently doc strings are not supported by stucumber package that we are using. Here is the issue about the topic without any activity: Support for doc strings would be great sjmeverett/stucumber#8
• What should our test layout have? Is it going to be just a simple extension of empty layout (alias)?

[ala-n]

🎉 This issue has been resolved in version 5.0.0-beta.17 🎉

The release is available on:

• npm package (@beta dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[ala-n]

🎉 This issue has been resolved in version 4.17.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀