chore: tests

[martian56]

This pull request updates the test suite for the chess project, replacing the previous test runner and expanding the test data with a comprehensive set of new and more descriptive test cases. The documentation is updated to reflect these changes, providing clearer instructions and more accurate descriptions of the testing process.

Test infrastructure updates:

• The Makefile test target now runs all levels of tests using tests/run_all_levels.sh, replacing the previous single-level test runner. This makes the test process more robust and consistent across different environments.

Documentation updates:

• The README.md and docs/slides/caissa.md have been revised to describe the new testing process and reference the new test data directory. Outdated test descriptions and tables have been removed for clarity. [1] [2] [3]

Test data expansion:

• Numerous new test files have been added under tests/data/, covering a wide range of legal and illegal chess moves, including specific cases for bishops, knights, pawns, rooks, castling, en passant, and check/checkmate scenarios. These tests are more descriptive and include comments in French to clarify the intent of each test. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17]

Key improvements:

Test infrastructure:

• Switched to a multi-level test runner script for broader and more reliable test coverage.

Documentation:

• Updated instructions and removed outdated test descriptions to match the new test setup. [1] [2] [3]

Test data:

• Added a comprehensive suite of new test cases with clear, descriptive comments, improving test coverage and maintainability. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17]