Add .editorconfig with common settings for consistent coding styles

Co-authored-by: kimchanhyung98 <60088641+kimchanhyung98@users.noreply.github.com>

Author: Copilot

.editorconfig

@@ -0,0 +1,36 @@
+# EditorConfig helps maintain consistent coding styles across various editors and IDEs
+# https://editorconfig.org
+
+root = true
+
+# Default settings for all files
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+charset = utf-8
+indent_style = space
+indent_size = 4
+
+# Makefile requires tab indentation
+[Makefile]
+indent_style = tab
+
+# Shell scripts
+[*.sh]
+indent_style = space
+indent_size = 4
+
+# JSON files
+[*.json]
+indent_style = space
+indent_size = 2
+
+# YAML files
+[*.{yml,yaml}]
+indent_style = space
+indent_size = 2
+
+# Markdown files
+[*.md]
+trim_trailing_whitespace = false