Add FMT function

[ziflex]

Add FMT(template, values) function that would replace placeholders with given values.

Example:

FOR idx IN 1..10
    LET selector = FMT("div.panel-group table tr:nth-child({})", idx)
    RETURN INNER_TEXT(selector)

I think Rust implementation might be more useful for this project, than Go's one.

Especially, ability to reuse parameters using their indexes.

format!("{1} {} {0} {}", 1, 2); // => "2 1 1 2"

[3timeslazy]

It's possible to reuse parameters by their name using Go's templates. Ex

{{ .P1 }} and {{ .P1 }} and {{ .P2 }}

[ziflex]

@3timeslazy you are right. Forgot about templates. Have never used them 🤔

[ziflex]

@3timeslazy do you wanna take this one?

[3timeslazy]

@ziflex sure.

[3timeslazy]

As far as I understand, the signature of the FMT function is:

func FMT(tmpl string, args ...core.Value)

[ziflex]

@3timeslazy yup, looks good!

[ziflex]

@3timeslazy hey, any updates on this?