Eval script consolidation (#238)

The script now supports:
   - YAML and JSON configurations
   - Dataset-specific parameters
   - Overriding configuration via command line
   - Detailed logging and error handling

eval/example_config.yaml

@@ -0,0 +1,33 @@
+# Example configuration for the evaluation script
+model: "meta-llama/llama-3.3-70b-instruct"
+provider: "Hyperbolic"
+output_dir: "results"
+max_concurrent: 10
+default_size: 20  # Default size for all datasets
+default_seed: 42  # Default seed for all datasets
+
+categories:
+  - category: "algebra"
+    datasets:
+      - dataset: "complex_arithmetic"
+        params:
+          min_real: -10
+          max_real: 10
+          min_imag: -10
+          max_imag: 10
+
+  - category: "arithmetic"
+    datasets:
+      - dataset: "products"
+        size: 10
+        seed: 43
+        params:
+          min_digits: 2
+          allow_negation: true
+
+      - dataset: "chain_sum"
+        size: 12
+        seed: 43
+        params:
+          min_digits: 2
+          allow_negation: true