feat(packages): add omniroute package

Add OmniRoute v3.8.28 - a unified AI router aggregating 160+ providers
with auto fallback, MCP/A2A support, and OpenAI-compatible APIs.

Uses a hybrid approach: GitHub source for dependency resolution via
fetchNpmDeps, combined with pre-built dist/ from the npm tarball to
avoid the complex Next.js build in the Nix sandbox.

README.md

@@ -23,6 +23,7 @@ A custom Nix overlay and flake providing additional packages not found in upstre
 | `kubernetes-mcp-server` | Model Context Protocol (MCP) server for Kubernetes and OpenShift | MCP Servers |
 | `loop` | Corporate messenger for your team | Communication |
 | `radar` | Modern Kubernetes visibility — topology, event timeline, service traffic, resource browsing, Helm management, and GitOps support | Kubernetes |
+| `omniroute` | Unified AI router with 160+ providers, auto fallback, MCP/A2A, OpenAI-compatible APIs | AI LLM Gateway |
 | `relay-free-llm` | RESTful API to route user prompts to various AI model providers with automatic failover and intent-based routing | AI LLM Gateway |
 | `stakpak` | DevOps AI agent that generates infrastructure code, debugs Kubernetes, configures CI/CD, and automates deployments | AI Agents |
 
@@ -121,6 +122,7 @@ nix-overlay/
 │   ├── kubernetes-mcp-server/  # MCP server for Kubernetes and OpenShift
 │   ├── loop/                   # Corporate messenger for your team
 │   ├── mcp-gateway/            # MCP protocol gateway
+│   ├── omniroute/              # Unified AI router with 160+ providers
 │   ├── radar/                  # Kubernetes UI (topology, timeline, Helm, GitOps)
 │   ├── relay-free-llm/        # AI model provider routing gateway
 │   ├── skillsmcp/              # MCP server for Agent Skills