* Add Pronatura Bydgoszcz
* follow contribution guide, clean code, address PR comments
* rename + minor changes
pronatura_bydgoszcz rename to match URL (add _pl)
removed unnecessary method get_data
NAME_MAP[waste_type] and ICON_MAP[waste_type] with get equivalents to prevent failour on name change
modified md file to be more in line with other sources
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Co-authored-by: 5ila5 <5ila5@users.noreply.github.com>
