Configure Bash script format rules

.editorconfig

@@ -0,0 +1,20 @@
+[*.sh]
+indent_style = space
+indent_size = 2
+
+# --language-variant
+shell_variant      = posix
+binary_next_line   = true
+# --case-indent
+switch_case_indent = true
+space_redirects    = true
+keep_padding       = true
+# --func-next-line
+function_next_line = true
+
+# Ignore the entire "third_party" directory when calling shfmt on directories,
+# such as "shfmt -l -w .". When formatting files directly,
+# like "shfmt -w third_party/foo.sh" or "shfmt --filename=third_party/foo.sh",
+# the ignore logic is applied only when the --apply-ignore flag is given.
+[third_party/**]
+ignore = true