SCRIPT: Add a name getter for IrVariable + add constructors and enforce the const-ness of the name of a variable

Some things where made const with a system upgrade, so take more things
as const structs and hop that everything will works.

Now should be able to parse function calls and variable references with
and without indices.

The IrExpression instances hold a pointer to their parent scope.

The IrRoot holds a global scope. In the future instruction blocks,
functions and jobs will hold a scope.

- Solves linking problems with the scripts (not implemented constructors)
- Apply clang format
- Solves compilation problems

WIP: Remove the `parse` method from IrElement, use a template base solution to avoid defining a method that makes no sens for some base classes

Some qname where cut and parsed as simple tokens because of the chop
thing, now we parse every simple token as qnames then we try to promote
them to simple tokens if they matches entirely the said simple token.