Implement luxury style for ostream operator parameters

Update friend std::ostream operator to use more descriptive parameter names:
- Replace 'out' with 'stream' for std::ostream parameter
- Replace 'obj' with 'self' for object parameter
- Update both C# and Python transformers for consistency

Fixes #65

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: konard

csharp/Platform.RegularExpressions.Transformer.CSharpToCpp.Tests/CSharpToCppTransformerTests.cs

@@ -35,5 +35,6 @@ public static void Main(string[] args)
             var actualResult = transformer.Transform(helloWorldCode);
             Assert.Equal(expectedResult, actualResult);
         }
+
     }
 }

csharp/Platform.RegularExpressions.Transformer.CSharpToCpp/CSharpToCppTransformer.cs

@@ -365,8 +365,8 @@ public class CSharpToCppTransformer : TextTransformer
             (new Regex(@"(?<classDeclarationBegin>\r?\n(?<indent>[\t ]*)template <typename (?<typeParameter>[^<>\n]+)> (struct|class) (?<type>[a-zA-Z0-9]+<\k<typeParameter>>)(\s*:\s*[^{\n]+)?[\t ]*(\r?\n)?[\t ]*{)(?<middle>((?!class|struct).|\n)+?)(?<toStringDeclaration>(?<access>(private|protected|public): )override std::string ToString\(\))"), "${classDeclarationBegin}/*~${type}~*/${middle}${toStringDeclaration}", 0),
             // Inside the scope of ~!Range!~ replace:
             // public: override std::string ToString() { return ...; }
-            // public: operator std::string() const { return ...; }\n\npublic: friend std::ostream & operator <<(std::ostream &out, const A &obj) { return out << (std::string)obj; }
-            (new Regex(@"(?<scope>/\*~(?<type>[_a-zA-Z0-9<>:]+)~\*/)(?<separator>.|\n)(?<before>((?<!/\*~\k<type>~\*/)(.|\n))*?)(?<toStringDeclaration>\r?\n(?<indent>[ \t]*)(?<access>(private|protected|public): )override std::string ToString\(\) (?<toStringMethodBody>{[^}\n]+}))"), "${scope}${separator}${before}" + Environment.NewLine + "${indent}${access}operator std::string() const ${toStringMethodBody}" + Environment.NewLine + Environment.NewLine + "${indent}${access}friend std::ostream & operator <<(std::ostream &out, const ${type} &obj) { return out << (std::string)obj; }", 0),
+            // public: operator std::string() const { return ...; }\n\npublic: friend std::ostream & operator <<(std::ostream &stream, const A &self) { return stream << (std::string)self; }
+            (new Regex(@"(?<scope>/\*~(?<type>[_a-zA-Z0-9<>:]+)~\*/)(?<separator>.|\n)(?<before>((?<!/\*~\k<type>~\*/)(.|\n))*?)(?<toStringDeclaration>\r?\n(?<indent>[ \t]*)(?<access>(private|protected|public): )override std::string ToString\(\) (?<toStringMethodBody>{[^}\n]+}))"), "${scope}${separator}${before}" + Environment.NewLine + "${indent}${access}operator std::string() const ${toStringMethodBody}" + Environment.NewLine + Environment.NewLine + "${indent}${access}friend std::ostream & operator <<(std::ostream &stream, const ${type} &self) { return stream << (std::string)self; }", 0),
             // Remove scope borders.
             // /*~Range~*/
             // 

python/cs2cpp/cs2cpp.py

@@ -364,8 +364,8 @@ def __init__(
         SubRule(r"(?P<classDeclarationBegin>\r?\n(?P<indent>[\t ]*)template <typename (?P<typeParameter>[^<>\n]+)> (struct|class) (?P<type>[a-zA-Z0-9]+<\k<typeParameter>>)(\s*:\s*[^{\n]+)?[\t ]*(\r?\n)?[\t ]*{)(?P<middle>((?!class|struct).|\n)+?)(?P<toStringDeclaration>(?P<access>(private|protected|public): )override std::string ToString\(\))", r"\g<classDeclarationBegin>/*~\g<type>~*/\g<middle>\g<toStringDeclaration>", max_repeat=0),
         # Inside the scope of ~!Range!~ replace:
         # public: override std::string ToString() { return ...; }
-        # public: operator std::string() const { return ...; }\n\npublic: friend std::ostream & operator <<(std::ostream &out, const A &obj) { return out << (std::string)obj; }
-        SubRule(r"(?P<scope>/\*~(?P<type>[_a-zA-Z0-9<>:]+)~\*/)(?P<separator>.|\n)(?P<before>((?<!/\*~\k<type>~\*/)(.|\n))*?)(?P<toStringDeclaration>\r?\n(?P<indent>[ \t]*)(?P<access>(private|protected|public): )override std::string ToString\(\) (?P<toStringMethodBody>{[^}\n]+}))", r"\g<scope>\g<separator>\g<before>\n\g<indent>\g<access>operator std::string() const \g<toStringMethodBody>\n\n\g<indent>\g<access>friend std::ostream & operator <<(std::ostream &out, const \g<type> &obj) { return out << (std::string)obj; }", max_repeat=0),
+        # public: operator std::string() const { return ...; }\n\npublic: friend std::ostream & operator <<(std::ostream &stream, const A &self) { return stream << (std::string)self; }
+        SubRule(r"(?P<scope>/\*~(?P<type>[_a-zA-Z0-9<>:]+)~\*/)(?P<separator>.|\n)(?P<before>((?<!/\*~\k<type>~\*/)(.|\n))*?)(?P<toStringDeclaration>\r?\n(?P<indent>[ \t]*)(?P<access>(private|protected|public): )override std::string ToString\(\) (?P<toStringMethodBody>{[^}\n]+}))", r"\g<scope>\g<separator>\g<before>\n\g<indent>\g<access>operator std::string() const \g<toStringMethodBody>\n\n\g<indent>\g<access>friend std::ostream & operator <<(std::ostream &stream, const \g<type> &self) { return stream << (std::string)self; }", max_repeat=0),
         # Remove scope borders.
         # /*~Range~*/
         #