Add .gitignore for JetBrains Rider
Add .gitignore for JetBrains Rider

JKarathiya/Lean,JKarathiya/Lean,StefanoRaggi/Lean,jameschch/Lean,jameschch/Lean,StefanoRaggi/Lean,QuantConnect/Lean,JKarathiya/Lean,jameschch/Lean,StefanoRaggi/Lean,QuantConnect/Lean,QuantConnect/Lean,jameschch/Lean,AlexCatarino/Lean,QuantConnect/Lean,jameschch/Lean,JKarathiya/Lean,StefanoRaggi/Lean,AlexCatarino/Lean,AlexCatarino/Lean,StefanoRaggi/Lean,AlexCatarino/Lean