Qute data eval mechanism

[ia3andy]

Description
It would be nice to have some kind of eval mechanism in Qute so that a data is processed as part of the template with evaluation:

bar = "evaluated";
foo = "also {bar} as a template"

template:

this is {eval foo}

output to:

this is also evaluated as a template

Implementation ideas

We could check that foo doesn't use eval to avoid any dangerous implementation, or we could see that as the developer problem no? I mean you don't need qute to create infinite loops :)

[quarkusbot]

/cc @mkouba