Add a minimal Makefile for core project tasks

[glenux]

Description

The project currently lacks a Makefile to standardize and simplify common development and build tasks. To enhance usability and reduce onboarding complexity, we propose adding a minimalist Makefile focusing on essential functionality. This first version will support core tasks like building, cleaning, testing, and providing a help summary.

Goals

• Provide a lightweight, easy-to-use Makefile.
• Focus on core functionality needed during early development.
• Leave room for future expansion as the project evolves.

Proposed Targets

1. build

   • Purpose: Compile the project binary.
   • Implementation: Run crystal build src/main.cr --release.
   • Why: Compiling the project is the primary task during development.

2. clean

   • Purpose: Remove build artifacts.
   • Implementation: Delete all binaries and intermediate files (e.g., ./bin, ./obj).
   • Why: Cleaning ensures a consistent build environment.

3. test

   • Purpose: Run the project's test suite.
   • Implementation: Execute crystal spec or an equivalent test command.
   • Why: Verifying functionality is critical for development.

4. help

   • Purpose: Display all available targets and their descriptions.
   • Implementation: Print a concise list of targets and their purposes.
   • Why: Assists developers in understanding and using the Makefile.