[core] Add `PageHeader`

[bharatkashyap]

• Add a PageHeader component to contain the page title, breadcrumbs and a possible actions section for the page
  

• Would have an actions to contain a search bar or other filters

• This PageHeader would become the default for a new pageHeader slot in the existing PageContainer component

Figma: https://www.figma.com/design/14OEUnwh4ahMb2empYAEc8/Toolpad-UX?node-id=1538-177265&node-type=frame&t=3bv6rhlNhH2D0lGE-0

Search keywords:

[github-actions]

This issue has been closed. If you have a similar problem but not exactly the same, please open a new issue.
Now, if you have additional information related to this issue or things that could help future readers, feel free to leave a comment.