adding support for wildcard model providers

demos/use_cases/wildcard_providers/config.yaml

@@ -0,0 +1,26 @@
+version: v0.3.0
+
+listeners:
+  # Model listener for direct LLM access
+  - type: model
+    name: llms
+    address: 0.0.0.0
+    port: 12000
+
+model_providers:
+  # OpenAI - support all models via wildcard
+  - model: openai/*
+    access_key: $OPENAI_API_KEY
+
+  # Anthropic - support all Claude models
+  - model: anthropic/*
+    access_key: $ANTHROPIC_API_KEY
+
+  - model: xai/*
+    access_key: $GROK_API_KEY
+
+
+  # Custom internal LLM provider
+  # Note: Requires base_url and provider_interface for unknown providers
+  - model: ollama/*
+    base_url: https://llm.internal.company.com