Convert simple-icons manual backup from submodule to tracked files

logos/simple-icons.manual-backup-20251123-234134/.editorconfig

@@ -0,0 +1,20 @@
+root=true
+
+[*]
+charset=utf-8
+indent_style=tab
+insert_final_newline=true
+trim_trailing_whitespace=true
+
+[*.md]
+indent_style = space
+indent_size=unset
+
+[*.svg]
+insert_final_newline=false
+
+[*.yml]
+indent_style=space
+
+[.github/**/*.md]
+trim_trailing_whitespace=false # Templates with trailing whitespace are more usable