\XeroPHP\Application\Query::execute() can fail to search due to + (plus) symbol

[edegaudenzi]

PHP version: x.y.z (hint: php --version)
8.3.6 (Ubuntu 24.04.1)
calcinai/xero-php v2.7.0

Description
Very long story-short: if I want to perform a search like where=Name=="Canal+ SARL", the actual executed query is where=Name%3D%3D%22Canal+%20SARL%22, returning NULL. '+' (plus) symbol didn't become %2B but instead remained + and Xero can't find it (Xero probably thinks + is rather a space character - the %20 to be explicit - ).
Unfortunately this impacts literally every Xero entity: Contacts, Invoices, etc.

How to reproduce
Of course you need to have a Contact in Xero called Canal+ SARL, then:

(new \XeroPHP\Application($access_token, $tenant_id))->load(\XeroPHP\Models\Accounting\Contact::class)->where('Name', 'Canal+ SARL')->execute()

It returns NULL instead of the existing Contact

Additional context
I've spent quite a lot of time understanding that in this case Guzzle is the one to blame, but Guzzle is also right at the same time; as you imagine it's a long and complicated story. I've also opened an issue here if you want to see the evil in the details.
On the xero-php package side, one possible solution to prevent this from happening is replacing + into %2B by ourselves. With this change: where=Name=="Canal%2B SARL" becomes where=Name%3D%3D%22Canal%2B%20SARL%22 and will find the Contact.