nip73: Add OSM tag kind

[DestBro]

OpenStreetMap Object References:

• Node: ["i", "osm:node:240949599"] – https://www.openstreetmap.org/node/240949599
• Way: ["i", "osm:way:5013364"] – https://www.openstreetmap.org/way/5013364
• Relation: ["i", "osm:relation:62422"] – https://www.openstreetmap.org/relation/62422

OpenStreetMap object references are globally unique identifiers for map elements. They use the format osm:<type>:<id> where <type> is one of node, way, or relation, and <id> is a numeric identifier.

• Nodes represent single geographic points (e.g., POIs, address points).
• Ways represent linear features or closed areas (e.g., roads, buildings).
• Relations represent structured groupings of nodes, ways, and/or other relations (e.g., routes, administrative boundaries, multipolygons).

These identifiers are stable and unique within their object type. The <type> MUST be lowercase and the <id> MUST be a positive integer.