Add editorconfig

.editorconfig

@@ -0,0 +1,36 @@
+# EditorConfig helps maintain consistent coding styles across different editors
+# See https://editorconfig.org
+
+# Top-most EditorConfig file
+root = true
+
+# Default settings for all files
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+# YAML files - 2 spaces
+[*.{yml,yaml}]
+indent_style = space
+indent_size = 2
+
+# JSON files - 2 spaces
+[*.json]
+indent_style = space
+indent_size = 2
+
+# JavaScript/TypeScript - 2 spaces
+[*.{js,jsx,ts,tsx}]
+indent_style = space
+indent_size = 2
+
+# Python - 4 spaces (PEP 8)
+[*.py]
+indent_style = space
+indent_size = 4
+
+# Markdown - no trimming
+[*.md]
+trim_trailing_whitespace = false