feat: add stakpak package (v0.3.86)

Stakpak is a DevOps AI agent that generates infrastructure code,
debugs Kubernetes, configures CI/CD, and automates deployments.

- Source: github.com/stakpak/agent v0.3.86
- Rust workspace (14 crates), default binary: stakpak
- Dependencies: openssl (transitive via native-tls), pkg-config
- License: Apache-2.0

README.md

@@ -24,6 +24,7 @@ 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 |
+| `stakpak` | DevOps AI agent that generates infrastructure code, debugs Kubernetes, configures CI/CD, and automates deployments | AI Agents |
 
 ## Usage
 
@@ -122,7 +123,8 @@ nix-overlay/
 │   ├── loop/                   # Corporate messenger for your team
 │   ├── mcp-gateway/            # MCP protocol gateway
 │   ├── radar/                  # Kubernetes UI (topology, timeline, Helm, GitOps)
-│   └── skillsmcp/              # MCP server for Agent Skills
+│   ├── skillsmcp/              # MCP server for Agent Skills
+│   └── stakpak/                # DevOps AI agent for infrastructure automation
 └── README.md
 ```