WMS visualization

WMS visualization endpoint for a given catalog item. This endpoint **should not be forged** but retrieved from the `_links` map in each catalog response. WMS protocol shall be used to request this endpoint. Please refer to the WMS documentation. Currently supported versions are `1.0.0`, `1.1.0` and `1.3.0`. The visualization is different according to processing level and product type: - SENSOR / bundle: on the fly orthorectification with panchromatic and multispectral images - ORTHO / b...