Added 2 RAT Plugins with their dependencies v3.0.12 (after v3.0.9)

What's Changed

• Forecasting Plugin by @pritamd47 in #90
• ResORR plugin and minor fix for forecasting by @SarathUW in #91
• Added RAT Tutorial & Bug Fixed (#92) in Routing Code & download link updated by @SanchitMinocha in #93
• Added python dependency for ResORR: geonetworkx & fixed Documentation errors by @SanchitMinocha in #94
• Forecasting bug fix by @pritamd47 in #95
• Solved dependency issues for plugins by @SanchitMinocha in #96

Full Changelog: v3.0.9...v3.0.12