[component]: Local header

[gfellerph]

Create the local header component. This is a new part of the header capable of displaying an application title and holding some optional, additional controls that can be slotted in.

Design

https://www.figma.com/design/JIT5AdGYqv6bDRpfBPV8XR/Foundations-%26-Components-Next-Level?node-id=2932-40151&t=saHtog1amMMrG60S-4

Requirements

• Slot for a page title
• Slot for random stuff to the right

Reference

### Tasks
- [ ] Check design, is everything ready for development
- [ ] Create the `<post-local-header>` component
- [ ] Add documentation
- [ ] Add e2e tests
- [ ] Add visual regression tests
- [ ] Design review