Add root-editorconfig in homedir as base-specification

Signed-off-by: Knut Ahlers <knut@ahlers.me>

.editorconfig

@@ -0,0 +1,26 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 2
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.go]
+indent_size = 1
+indent_style = tab
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.py]
+# https://google.github.io/styleguide/pyguide.html#s3.4-indentation
+indent_size = 4
+indent_style = space
+
+[*.sh]
+# https://google.github.io/styleguide/shellguide.html#s5.1-indentation
+indent_size = 2
+indent_style = space