Ability to extending routing to include language-market stem

[paulmcgann]

Hi,

We are working on a poc for adding the market to the url of the foundation site to include the market along with the language segment for example:

https://www.foundtion.com/en-gb/page-one
https://www.foundtion.com/en-de/page-one
https://www.foundtion.com/en-us/page-one

We have forked the repository and created a sample implementation, the piece we are struggling with is when we use the market switcher in the site this is causing issues, where is is retrieving a 3 letter country code vs a 2 letter country code.

You can see the approach we have taken here:
https://github.com/paulmcgann/Foundation/tree/routing

We have added steps to the pipeline and added some initialization you can see this in the following folder:
https://github.com/paulmcgann/Foundation/tree/routing/src/Foundation/Infrastructure/Routing

Also we have modified the startup to add the steps into the pipeline here:
https://github.com/paulmcgann/Foundation/blob/routing/src/Foundation/Startup.cs#L240-L242

Would someone be able to review and maybe suggest some improvements, as we feel we are not far away from a working solution?