dggridR version 3.1.1
Merge master into development - Updated version to 3.1.1 and date to 2026-01-18 from master - Added Edzer Pebesma to authors - Integrated DeepWiki badge from master - Resolved conflicts in DESCRIPTION and README.md
Merge master into development - Updated version to 3.1.1 and date to 2026-01-18 from master - Added Edzer Pebesma to authors - Integrated DeepWiki badge from master - Resolved conflicts in DESCRIPTION and README.md