Add new LiteLLM template to the repository. (#303)

* working

* Refactor LiteLLM template to centralize environment variables and improve configuration structure

* Refactor LiteLLM docker-compose and template to use volumes and simplify port configuration

* Refactor LiteLLM blueprint to simplify environment configuration and improve service definitions

* Refactor LiteLLM blueprint to centralize environment variables, enhance security with stronger defaults, and improve provider API key configuration

* Format tags as arrays in meta.json for improved readability

meta.json

@@ -2548,6 +2548,25 @@
       "mailing-list"
     ]
   },
+  {
+    "id": "litellm",
+    "name": "LiteLLM",
+    "version": "main-stable",
+    "description": "LiteLLM is a lightweight OpenAI API-compatible proxy for managing multiple LLM providers with a single endpoint.",
+    "logo": "image.png",
+    "links": {
+      "github": "https://github.com/BerriAI/litellm",
+      "website": "https://docs.litellm.ai",
+      "docs": "https://docs.litellm.ai/docs/proxy/quick_start"
+    },
+    "tags": [
+      "ai",
+      "proxy",
+      "llm",
+      "openai-compatible",
+      "monitoring"
+    ]
+  },
   {
     "id": "livekit",
     "name": "Livekit",