Merge pull request #28755 from kolyshkin/editorconfig

.editorconfig: add indentation rule for shell files

Author: Luap99

.editorconfig

@@ -0,0 +1,13 @@
+# See https://EditorConfig.org
+
+# This is a top-most EditorConfig file.
+root = true
+
+# Ignore any "vendor" directories.
+[**/vendor/**]
+ignore = true
+
+# Bash, bats, and sh files use 4 spaces for indentation.
+[*.{bash,bats,sh}]
+indent_style = space
+indent_size = 4