Apply global .clang-format formatting settings for all C++ files

[konard]

Summary

• ✅ Added comprehensive .clang-format configuration file with consistent formatting rules
• ✅ Applied formatting to all 117 C++ source files (.h, .hpp, .cpp, .c, .cc, .cxx)
• ✅ Configured for Allman brace style, 4-space indentation, 120-character line limit
• ✅ Improved code readability and consistency across the entire C++ codebase

Configuration Details

The .clang-format file uses LLVM base style with project-specific customizations:

• Brace Style: Allman (opening braces on new lines)
• Indentation: 4 spaces, no tabs
• Line Length: 120 characters maximum
• Standard: C++17
• Namespace: No indentation for namespace contents
• Template Breaking: Always break before template declarations

Changes Made

• 84 files changed: 7,664 insertions(+), 6,269 deletions(-)
• New file: .clang-format configuration
• Formatted files: All C++ headers and source files in the repository

Benefits

• Consistent code formatting across the entire codebase
• Improved readability and maintainability
• Easy to apply to new C++ files using clang-format command
• Standardized development workflow

Test Plan

• Verify all C++ files compile after formatting
• Ensure no functional changes, only formatting improvements
• Confirm .clang-format configuration works correctly

🤖 Generated with Claude Code

---

Resolves #386