Ignore backtick characters to make squiggle objects also valid javascript objects.

[NunoSempere]

Consider the following javascript object:

{
    productivity: {
        numpeople: `20 to 30`,// at any one time
        duration: `6`, // months
        multiplier: `0.5 to 50`, // does this include collaborations, though?
        valueofwork: `2k to 100k`, // in dollars/month of work
        f: `{|prod|
            n = prod.numpeople
            t = prod.duration
            mult = prod.multiplier
            val = prod.valueofwork
            n * t * mult * val
        }`
    },
    collaborations: { // to do
        numpeople: `10 to 30`, // at any one time
        colaborationprobability: `2`,
        colaborationvalue: `2`,
        f: `{|colab|
            2
        }`
    }
}

Then if the backticks (`) are ignored, this is also a valid squiggle program.

Suggestion: Ignore backticks in squiggle so that things like the above are possible.
Pros: Hierarchical models like the above are marginally easier to work with
Cons: Not sure how to add this to peggy + backticks become unavailable for future functionality
Importance: Low

[OAGr]

I'm pretty hesitant to ignore backticks; I'd rather have Squiggle use them for something.

This approach feels fairly wrong to me. There are a lot of ways we could import functionality from JS, this seems pretty hacky.