Add CI pipeline checks to verify code formatting for TypeSpec, Markdown, and Rust files

.editorconfig

@@ -0,0 +1,25 @@
+root = true
+
+[*]
+insert_final_newline = true
+indent_style = space
+trim_trailing_whitespace = true
+
+[*.rs]
+indent_size = 4
+end_of_line = lf
+
+[*.{js,ts,json,yaml,yml}]
+indent_size = 2
+
+[*.{md,tsp}]
+indent_size = 2
+
+[*.toml]
+indent_size = 2
+
+[*.{ps1,sh}]
+indent_size = 2
+
+[*.bicep]
+indent_size = 2