fix(structure_on_project): Alterei algumas coisas importantes para da…

[DevlTz]

This pull request updates the documentation and example files to better reflect the current state and usage of the Huffman compressor project. The most significant changes are in the README.md, which now provides updated instructions, improved naming, and clarifies the compilation and usage steps. Additionally, a new simple C++ example file was added for testing, and several placeholder README files were removed from subdirectories.

Documentation improvements and usage instructions:

• Major update to README.md:
  • Renamed freq_counter to contador_frequencia throughout the documentation.
  • Updated repository tree structure and clarified compilation instructions for both CMake and G++.
  • Provided new usage examples with updated binary names and command-line flags.
  • Removed outdated sections, added notes about future improvements, and included new reference links.

Examples and test files:

• Added a new simple C++ example file examples/codes_test/simple_code.cpp to help test the compressor and frequency counter.

Cleanup of placeholder documentation:

• Removed placeholder README files from examples/small_texts, tests/integration, and tests/unit directories. [1] [2] [3]

Scripts:

• Removed the scripts/generate_dataset.sh script, which previously created sample files for compression tests.