Daml language examples, fixed internal references and reordering of modules

[JavierStark]

• Added the examples from digital-asset/daml/sdk/docs/source/sdk/tutorials/smart-contracts/daml/daml-intro-data/daml into Language Fundamentals docs section.
• Changed markdown code snippet from bash to haskell in two locations where it was not properly formatting the code

[JavierStark]

I also proposed a new order for the navigation of Module 3 as some modules make reference to other modules later in the section and following them in order hard.