[WIP] Create C++ competitive programming repository setup

[Copilot]

• Create folder structure (src/, include/, templates/, scripts/, tests/)
• Create setup.sh script for cross-platform tool installation
• Create cf CLI command script for template generation and code execution
• Create template.cpp with competitive programming boilerplate
• Create Makefile for building and running C++ files
• Create comprehensive README.md with usage instructions
• Add .gitignore to exclude build artifacts
• Test all scripts on current platform
• Verify compilation and execution workflow

Original prompt

You are a GitHub automation agent with full coding and repository setup skills. I want you to create a new GitHub repository for C++ competitive programming that works cross-platform on Linux (Ubuntu), macOS (ARM/x86), and WSL. The repo must be fully ready-to-use for Codeforces-style problem solving, and everything should be installable and configured automatically with a single setup script.

Repository requirements:

1. Folder structure:

   • src/ : for source code files
   • include/ : for headers
   • templates/ : ready-to-use problem templates
   • scripts/ : setup and helper scripts
   • tests/ : optional input/output test cases

2. Setup script (scripts/setup.sh) that:

   • Detects OS (Linux/macOS) and installs required tools
   • Installs latest g++ (14.x or 23.x) and clang++ if missing
   • Installs make, gdb or lldb, and other standard build tools
   • Configures fast I/O defaults for C++ (ios::sync_with_stdio(false); cin.tie(nullptr);)
   • Optionally installs or configures editors: nvim and VS Code extensions for C++/competitive programming
   • Ensures all scripts, commands, and template compilation work cross-platform

3. cf CLI command script (scripts/cf) that:

   • Can be run as cf template "name" to:
     • Create a folder with the given name inside src/
     • Create a .cpp file inside with the Codeforces template
     • Compile it once to verify setup works
   • Can be run as cf "name" {inputfile.txt} to:
     • Find the .cpp file in the current directory or folder matching name
     • Compile it with proper g++ flags (-std=c++23 -O2 -Wall) or clang++
     • Run it with the given input file or input string
     • Display output immediately with no buffering issues
   • Is idempotent, robust, and fully commented

4. Template source (src/template.cpp):

   • Standard C++ headers included
   • Fast I/O setup
   • Handy macros for competitive programming
   • Example input/output harness
   • Fully compilable out-of-the-box

5. Build system:

   • Include a Makefile or build.sh script that compiles any .cpp file in src/ and runs it
   • Works automatically on Linux and macOS

6. README.md:

   • Explains how to clone the repository
   • How to run scripts/setup.sh
   • How to use cf template and cf commands
   • How to solve problems immediately with minimal setup

7. Additional requirements:

   • Scripts must be portable, robust, and idempotent
   • All code and scripts fully commented and easy to understand
   • Initial commit message: "Initial setup for cross-platform C++ competitive programming environment with cf commands"

Output:

• A complete GitHub repository structure with all files, scripts, templates, and setup instructions ready to clone and run on Linux/macOS/WSL. All setup, compilation, and execution should work automatically and consistently.

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