Add ignore rules

Author: aimenux

.gitignore

@@ -348,3 +348,6 @@ MigrationBackup/
 
 # Ionide (cross platform F# VS Code tools) working folder
 .ionide/
+
+# Jetbrains files
+.idea/

.idea/.idea.CommandLineToolsDemo/.idea/.gitignore

@@ -23,6 +23,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Files", "Files", "{BEA45A39
 		.editorconfig = .editorconfig
 		Directory.Build.props = Directory.Build.props
 		Directory.Packages.props = Directory.Packages.props
+		.gitignore = .gitignore
 	EndProjectSection
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "4-Cocona", "4-Cocona", "{0DB2B961-9E40-4834-B373-EE8303AA3BFA}"