Add URLs with focus on province

Original ticket opened by @n.lanzanasto

Allow the following URLs:

avalanche.report/tirol
avalanche.report/south_tyrol
avalanche.report/trentino
lawinen.report/tirol
lawinen.report/südtirol
lawinen.report/trentino
valanghe.report/tirolo
valanghe.report/alto_adige
valanghe.report/trentino

Each of the URLs should open the webpage with the map focused on the respective region.