mcp: either register prompts or set HasPrompts to false

[Vi-shub]

Problem

pkg/mcp/mcp.go sets HasPrompts: true on ServerOptions, but New() only registers tools and resources thus no prompts are added anywhere under pkg/mcp/.

Clients that trust capability flags may assume prompts exist when they do not.

Options

1. Set HasPrompts: false until prompts are implemented, or
2. Add one or more MCP prompts (e.g. guided “create / build / deploy” workflow) and tests.

References

• pkg/mcp/mcp.go (HasPrompts: true, tools/resources registration below).

I guess this is kind of bug or area of implementing mcp. But will sure add a good solution :)