Draft: Add development branch with the new PageBundle, ArticleBundle, SnippetBundle

[Prokyonn]

Q	A
Bug fix?	no
New feature?	no
BC breaks?	no
Deprecations?	no
Fixed tickets	fixes #issuenum
Related issues/PRs	#issuenum
License	MIT
Documentation PR	sulu/sulu-docs#prnum

What's in this PR?

Explain the contents of the PR.

Why?

Which problem does the PR fix? (remove this section if you linked an issue above)

Example Usage

// If you added new features, show examples of how to use them here
// (remove this section if not a new feature)

$foo = new Foo();

// Now we can do
$foo->doSomething();

BC Breaks/Deprecations

Describe BC breaks/deprecations here. (remove this section if not needed)

To Do

• Create a documentation PR
• Create PR for sulu/sulu test skeleton