Add minimum_should_match support for BoolQuery

[srowan]

Updates BoolQuery to allow for setting the minimum_should_match option

• This option is a string with a variety of formats, so it made sense to me to just keep it as a string value
• If the option is not set, nothing is added to the payload

This option is very useful when you need it, but is perhaps somewhat niche - would you want it added to the readme?

[srowan]

One thing to note - this change does not allow for setting this option on the top-most BoolQuery which gets instanciated here:

    public function addQuery(Query $query, string $boolType = 'must'): static
    {
        if (! $this->query) {
            $this->query = new BoolQuery();
        }

        $this->query->add($query, $boolType);

        return $this;
    }

I think this could be worked around, but it would be nice if there was a clean way to do that

[freekmurze]

Thanks!