feat: add traycer desktop package

Traycer is an open-source AI orchestration desktop app (Electron).
Packaged from the upstream AppImage via appimageTools.wrapType2,
matching the existing loop package pattern.

README.md

@@ -29,6 +29,7 @@ A custom Nix overlay and flake providing additional packages not found in upstre
 | `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 |
+| `traycer` | Open-source AI orchestration app for agentic coding | AI Coding Agents |
 
 ## Usage
 
@@ -155,7 +156,8 @@ nix-overlay/
 │   ├── radar/                  # Kubernetes UI (topology, timeline, Helm, GitOps)
 │   ├── relay-free-llm/        # AI model provider routing gateway
 │   ├── skillsmcp/              # MCP server for Agent Skills
-│   └── stakpak/                # DevOps AI agent for infrastructure automation
+│   ├── stakpak/                # DevOps AI agent for infrastructure automation
+│   └── traycer/                 # AI orchestration desktop app (agentic coding)
 └── README.md
 ```