Project Setup

[StefanGreve]

• Add Directory.Build.props (see also: https://github.com/Advanced-Systems/core)
• Auto-generate Documentation with docfx #6
• NuGet Registry #7
• Update readme icon using the new assets repository
• Add status badges to readme
• Add package icon
• For the docs: add favicon and brand logo to images directory
• Enable GitHub Pages (source = Deploy from a branch and branch = gh-pages)
• Normalize line endings and update .gitattributes file
• Promote Abstractions project to net8.0
• Add the other workflow files

See also: Advanced-Systems/core#1