tool: add kv overrides to start command (win)

DeepSeek-V2-Chat.q2_k.gguf/download_and_run.bat

@@ -27,6 +27,11 @@ server.exe ^
   -m DeepSeek-V2-Chat.q2_k.gguf ^
   -c 4096 ^
   -i ^
-  --mlock
+  --mlock ^
+  --override-kv deepseek2.attention.q_lora_rank=int:1536 ^
+  --override-kv deepseek2.attention.kv_lora_rank=int:512 ^
+  --override-kv deepseek2.expert_shared_count=int:2 ^
+  --override-kv deepseek2.expert_feed_forward_length=int:1536 ^
+  --override-kv deepseek2.leading_dense_block_count=int:1
 
 endlocal