DSL linting, syntax highlighting and formatting

**Is your feature request related to a problem? Please describe.**

We have created some workflows but at some point it gets quite difficult to work as the format seems not to be recognized by the IDE (at least VSCode)

**Describe the solution you'd like**

It would be great to be able to:

- be able to have a syntax highlighting to be able to be able to spot reserved words
- formatting just to be able to easily read the workflow without requiring manual intervention
- linting to spot any issues or typos

**Describe alternatives you've considered**

N/A

**Additional context**

N/A