Setup editorconfig.

Author: CodeMan99

.devcontainer/devcontainer.json

@@ -26,6 +26,7 @@
 			"extensions": [
 				"bierner.github-markdown-preview",
 				"DavidAnson.vscode-markdownlint",
+				"EditorConfig.EditorConfig",
 				"GitHub.vscode-github-actions"
 			]
 		}

.editorconfig

@@ -0,0 +1,24 @@
+# EditorConfig helps developers define and maintain consistent
+# coding styles between different editors and IDEs
+# editorconfig.org
+
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+# double whitespace at end of line
+# denotes a line break in Markdown
+trim_trailing_whitespace = false
+
+[*.yml]
+indent_size = 2
+
+[*devcontainer{,-feature}.json]
+indent_style = tab