Quarkus Agent MCP skill to guide AI agents toward the Apache Camel MCP server

### Describe the feature here

Quarkus 3.35 introduced [Quarkus Agent MCP](https://quarkus.io/blog/introducing-agent-mcp), which allows extensions to ship a [META-INF/quarkus-skill.md](https://quarkus.io/blog/introducing-agent-mcp/#for-extension-authors-shipping-skills-with-your-extension) file in their deployment JAR. This file is automatically discovered by the quarkus_skills MCP tool and loaded into AI coding assistants before they write code, ensuring idiomatic and correct patterns.

Separately, we have a dedicated[ Camel JBang MCP server](https://camel.apache.org/manual/camel-jbang-mcp.html) that exposes catalog and validation tools: component documentation lookups, error diagnosis, and more.

Add a quarkus-skill.md to camel-quarkus extensions (ideally only on the camel quarkus core extension), to instruct the Quarkus Agent MCP how to use the Camel JBang MCP server for our extensions.