Add 1.5 config

Author: jackzhxng

examples/models/qwen2_5/1_5b_config.json

@@ -0,0 +1,12 @@
+{
+  "dim": 1536,
+  "ffn_dim_multiplier": 1,
+  "hidden_dim": 8960,
+  "n_heads": 12,
+  "n_kv_heads": 2,
+  "n_layers": 28,
+  "norm_eps": 1e-06,
+  "rope_theta": 1000000.0,
+  "use_scaled_rope": false,
+  "vocab_size": 151936
+}