[5.x] Add to_qs modifier

[godismyjudge95]

This PR adds a simple to_qs modifier that passes the incoming array or array-like value to Laravel's Arr::query() helper method.

Example Data:

$params = [
    'mode' => 'plaid',
    'area' => [51, 52],
    'hat' => null,
    'transportation' => [
        'bike' => true,
        'delorian' => false,
    ],
];

Example Template:

<a href="/search?{{ params | to_qs }}">Search Now</a>

Example Output:

<a href="/search?mode=plaid&area%5B0%5D=51&area%5B1%5D=52&transportation%5Bbike%5D=1&transportation%5Bdelorian%5D=0">Search Now</a>

(I don't like the encoded characters any more than you do - but that is the output)

---

Edit: Changed the modifier to to_qs per the discussion below.

[jasonvarga]

Sorry to keep nitpicking your PRs. They're good!

But the first thing I thought of when seeing to_query was that it was being converted to a query builder somehow.

Can we call it to_query_string or query_string or even just qs?

I don't mind qs as I feel like it's pretty a common abbreviation. There's even a popular npm package. https://www.npmjs.com/package/qs

[godismyjudge95]

Sorry to keep nitpicking your PRs. They're good!

But the first thing I thought of when seeing to_query was that it was being converted to a query builder somehow.

Can we call it to_query_string or query_string or even just qs?

I don't mind qs as I feel like it's pretty a common abbreviation. There's even a popular npm package. npmjs.com/package/qs

Your nitpicks are always welcome 😄 I was struggling myself to think of a good name that made sense as I think a lot of people may have used "query" as a variable name.

What would you say to to_qs - I like the to_ pattern Statamic has going to denote a final transform (ie. to_json)

[jasonvarga]

to_qs works too. 👍