Refactor CMake and VSCode settings; add Day 4 solution

- Updated .vscode/settings.json to enhance Clangd configuration and disable IntelliSense.
- Removed obsolete Clang-Format and Clang-Tidy tasks from .vscode/tasks.json.
- Modified CMakeLists.txt to enable compile commands export and adjusted target properties for Day 4.
- Added new CMakeLists.txt and main.cpp for Day 4 solution, implementing diagram parsing and movable paper counting logic.
- Included test_input and puzzle_input files for Day 4.
- Deleted the run-clang-tidy.sh script as it is no longer needed.

.devcontainer/Dockerfile

@@ -7,6 +7,8 @@ RUN apt-get update \
    cmake \
    ninja-build \
    build-essential \
+   libc++-dev \
+   libc++abi-dev \
    git \
    python3 \
    python3-pip \