include max radius and MAX_RADIUS, WINDOW_SIZE constants

There we add the max_radius argument to LIS, following the ongoing fix in rastertools:

https://github.com/CNES/rastertools/pull/1

doc/atbd/fsc_config_schema.json

@@ -302,17 +302,17 @@
                 },
                 "rastertools_window_size": {
                     "id": "rastertools_window_size",
-                    "default": 1024,
+                    "default": 2048,
                     "description": "Define size of tiles to distribute processing",
                     "title": "the rastertools_window_size schema",
-                    "type": "boolean"
+                    "type": "integer"
                 },
                 "rastertools_radius": {
                     "id": "rastertools_radius",
-                    "default": null,
+                    "default": 512,
                     "description": "Max distance (in pixels) around a point to evaluate horizontal elevation angle",
                     "title": "the rastertools_radius schema",
-                    "type": "boolean"
+                    "type": "integer"
                 }
             }
         },