Remove IDE-specific files from version control

- Remove .idea/workspace.xml from repository
- Add .idea/ directory to .gitignore
- Add *.DotSettings.user to .gitignore

These files contain user-specific IDE settings and should not be in version control.

Author: ANcpLua

.gitignore

@@ -7,6 +7,11 @@
 ##
 ## Get latest from https://github.com/github/gitignore/blob/main/Dotnet.gitignore
 
+# JetBrains Rider
+.idea/
+*.sln.iml
+*.DotSettings.user
+
 # Build results
 [Dd]ebug/
 [Dd]ebugPublic/