Implement safe cracking logic and setup development environment

- Added a new `main.cpp` file with logic to parse dial rotations from a file and execute safe cracking based on the parsed data.
- Introduced a `DialRotation` struct to represent the direction and distance of dial rotations.
- Implemented `parseRotations` function to read and parse input from a specified file, returning a vector of `DialRotation` or an error message.
- Created `executeSafeCrack` function to process the dial rotations and print the current state of the dial.
- Added `.clang-format` and `.clang-tidy` configuration files for code formatting and linting.
- Set up a Dockerfile for a development container with necessary tools and dependencies.
- Configured VS Code settings and tasks for building, formatting, and running clang-tidy.
- Added a script to run clang-tidy on the source files, ensuring code quality.

CMakeLists.txt

@@ -1,4 +1,9 @@
 cmake_minimum_required(VERSION 3.10.0)
+
+# Set compilers before project() to ensure they're used
+set(CMAKE_C_COMPILER /usr/bin/clang-21)
+set(CMAKE_CXX_COMPILER /usr/bin/clang++-21)
+
 project(aoc25 VERSION 0.1.0 LANGUAGES C CXX)
 
 # Per-day subprojects (example: day1)