Create config.json

Initial model configuration for AfriLION-Base:

- RoBERTa-base architecture (12 layers, 768 hidden size)
- 50K vocabulary size for multilingual African language support
- 12 attention heads with GELU activation
- Max sequence length: 514 tokens
- Dropout: 0.1 for regularization
- Compatible with Hugging Face Transformers 4.36.0+

config.json

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+{
+  "architectures": [
+    "RobertaForMaskedLM"
+  ],
+  "attention_probs_dropout_prob": 0.1,
+  "bos_token_id": 2,
+  "eos_token_id": 3,
+  "hidden_act": "gelu",
+  "hidden_dropout_prob": 0.1,
+  "hidden_size": 768,
+  "initializer_range": 0.02,
+  "intermediate_size": 3072,
+  "layer_norm_eps": 1e-05,
+  "max_position_embeddings": 514,
+  "model_type": "roberta",
+  "num_attention_heads": 12,
+  "num_hidden_layers": 12,
+  "pad_token_id": 0,
+  "position_embedding_type": "absolute",
+  "transformers_version": "4.36.0",
+  "type_vocab_size": 1,
+  "use_cache": true,
+  "vocab_size": 50000,
+  "tokenizer_class": "PreTrainedTokenizerFast"
+}