This PR represents the implementation of a simple build automation tool similar to Make, but with a simpler featureset.

It includes the implementation of features such as:

• Parse a Makefile into targets with their dependencies and associated commands
• Detect and report circular dependencies
• Execute shell commands associated with each target
• Accept target names as command-line arguments
• Accept a custom Makefile via optional '-f' flag
• Execute independent targets concurrently using goroutines
• Handle and report errors in Makefile parsing and commands execution