feat: Add .gitignore rules to prevent nested .editorconfig files (#195)

* chore: initial plan for .gitignore editorconfig rules

* feat: Add .gitignore rules to prevent nested .editorconfig files

Co-authored-by: samtrion <3283596+samtrion@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: samtrion <3283596+samtrion@users.noreply.github.com>

Author: Copilot

.gitignore

@@ -360,3 +360,7 @@ MigrationBackup/
 
 # Ionide (cross platform F# VS Code tools) working folder
 .ionide/
+
+# Prevent nested .editorconfig files - only root .editorconfig should be used
+**/.editorconfig
+!/.editorconfig