EditorConfig essentials (#4445)

.editorconfig

@@ -1,11 +1,22 @@
-# EditorConfig specs and documentation: https://EditorConfig.org
-
-# top-most EditorConfig file
-root = true
-
-# C++ Code Style settings
-[*.{c++,cc,cpp,cppm,cxx,h,h++,hh,hpp,hxx,inl,ipp,ixx,tlh,tli}]
-cpp_generate_documentation_comments = doxygen_slash_star
-
-[CMakeLists.txt]
-ij_continuation_indent_size = 4
+# EditorConfig specs and documentation: https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{yml,nix}]
+indent_size = 2
+
+# C++ Code Style settings
+[*.{c++,cc,cpp,cppm,cxx,h,h++,hh,hpp,hxx,inl,ipp,ixx,tlh,tli}]
+cpp_generate_documentation_comments = doxygen_slash_star
+
+[CMakeLists.txt]
+ij_continuation_indent_size = 4