chore: clang-format configuration file based on LLVM

[codeaddict-119]

Summary

Adds a .clang-format configuration file to enforce automated, consistent C++ code styling across the repository. The configuration is built on top of the LLVM base style with explicit overrides tailored for this project.

• Braces: Allman style (BreakBeforeBraces: Allman).
• Alignment: Pointers and references align to the right (PointerAlignment, ReferenceAlignment).
• Wrapping: 100-character column limit with bin-packing disabled for function arguments and parameters.
• Formatting: Control statements include spaces before parentheses; short functions/blocks are only allowed on a single line if they are empty.