GeocodeQuery WithBounds not strictly used across providers that support it

Start by inspecting the Nominatim provider's existing viewbox and bounded handling, then trace the Pelias providers through getGeocodeQueryUrl. Compare how GeocodeQuery exposes getBounds() with each provider's supported request parameters. Done means providers that support rectangular bounds consistently use the query bounds without requiring duplicated provider-specific data.

The WithBounds logic needs to be added to providers, as the method is a base method in the query.

E.g. in Nominatims provider we see:

        $viewbox = $query->getData('viewbox');
        if (!is_null($viewbox) && is_array($viewbox) && 4 === count($viewbox)) {
            $url .= '&'.http_build_query([
                'viewbox' => implode(',', $viewbox),
            ], '', '&', PHP_QUERY_RFC3986);

            $bounded = $query->getData('bounded');
            if (!is_null($bounded) && true === $bounded) {
                $url .= '&'.http_build_query([
                    'bounded' => 1,
                ], '', '&', PHP_QUERY_RFC3986);
            }
        }

The above should instead or in-addition accept $query->getBounds(), because otherwise it forces us to write code like:

        // Bounds of EU/UK where our customers are
        $euBounds = new Bounds(34.857764, -30.428009, 75.400203, 41.642303);

        $geocodeQuery = GeocodeQuery::create($query)
            ->withBounds($euBounds)
            // For Nominatim
            ->withData('viewbox', $euBounds->toArray());

Pelias Providers and those that extend it don't support it at all -even though Pelias does:
https://github.com/pelias/documentation/blob/master/search.md#search-within-a-rectangular-region

    /**
     * @param array<string, mixed> $query_data additional query data (API key for instance)
     *
     * @throws \Geocoder\Exception\Exception
     */
    protected function getGeocodeQueryUrl(GeocodeQuery $query, array $query_data = []): string
    {
        $address = $query->getText();

        // This API doesn't handle IPs
        if (filter_var($address, FILTER_VALIDATE_IP)) {
            throw new UnsupportedOperation(sprintf('The %s provider does not support IP addresses, only street addresses.', $this->getName()));
        }

        $data = [
            'text' => $address,
            'size' => $query->getLimit(),
            'layers' => null !== $query->getData('layers') ? implode(',', $query->getData('layers')) : null,
            'boundary.country' => null !== $query->getData('boundary.country') ? implode(',', $query->getData('boundary.country')) : null,
        ];

        return sprintf('%s/search?%s', $this->root, http_build_query(array_merge($data, $query_data)));
    }