chore: add .editorconfig for consistent coding styles

.editorconfig

@@ -0,0 +1,35 @@
+# EditorConfig is awesome: 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
+
+# Go files
+[*.go]
+indent_style = tab
+indent_size = 4
+
+# JSON, YAML, and Markdown files
+[*.{json,yml,yaml,md}]
+indent_style = space
+indent_size = 2
+
+# JavaScript/TypeScript files
+[*.{js,ts,tsx}]
+indent_style = space
+indent_size = 2
+
+# Shell scripts
+[*.sh]
+indent_style = space
+indent_size = 2
+
+# Makefile
+[Makefile]
+indent_style = tab