feat(config): add YAML config templates for dev, production and personal use

configs/dev_test.yaml

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+# Quick Development/Testing Configuration
+#
+# Fast configuration for development and testing with short runs.
+
+# Experiment settings
+exp_name: "brittle_star_dev_test"
+seed: 123
+
+# Tracking settings - IMPORTANT: Set your own wandb_entity!
+track: true
+wandb_project_name: "PPO-Modularity-Dev"
+wandb_entity: null  # ⚠️  SET THIS TO YOUR WANDB USERNAME OR TEAM
+
+# Model saving
+save_model: true
+checkpoint_frequency: 10  # More frequent checkpoints for testing
+
+# Environment settings
+num_envs: 4  # Smaller for faster iteration
+
+# Training hyperparameters - Fast/testing
+total_timesteps: 100000  # Short run for testing
+learning_rate: 0.001  # Higher learning rate for faster learning
+num_steps: 64  # Shorter rollouts
+anneal_lr: true
+
+# PPO specific - Optimized for quick results
+gamma: 0.99
+gae_lambda: 0.95
+num_minibatches: 2
+update_epochs: 2  # Fewer epochs for speed
+norm_adv: true
+clip_coef: 0.1
+clip_vloss: true
+ent_coef: 0.02  # Higher entropy for exploration
+vf_coef: 0.5
+max_grad_norm: 0.5
+target_kl: null
+
+# Hardware
+cuda: true
+torch_deterministic: true