Simple agent refactoring + Ecs7002p 2023-2024 preparations

[diegopliebana]

Changes:

• Basic MCTS now has its own BasicMCTSParams class. This agent is also in its own package now.
• The state evaluation heuristic in RMHC has been moved to RMHCParams, for consistency with MCTS and RHEA agents.
• Added a few json files for the simpler agents to the json/players directory.
• Also added a couple of default tournament JSON files to json/experiments.
• Minor code simplifications/beautifications to ease the understanding of the code for ECS7002P (23/24)