feat(mcp): hybrid tool mode — kyber_ask + dynamic intent tools

[pgroene]

Feature: Hybrid MCP tool mode

Currently Kyber exposes only 4 fixed tools. This means the external LLM always delegates to \kyber_ask\ and cannot directly call HA intents.

Proposal

Add a config option \mcp_tool_mode:

• \�sk_only\ (current default) — only kyber_ask + helpers
• \dynamic\ — expose one tool per HA intent/domain (like HA native MCP)
• \hybrid\ — expose both kyber_ask AND dynamic tools

In hybrid mode, capable LLMs (GPT-4o, Claude) can choose: use \kyber_ask\ for complex natural-language requests, or call a specific intent tool directly for simple deterministic actions.

Benefits of hybrid

• Fast path: \HassTurnOn\ for simple on/off (no AI loop overhead)
• Smart path: \kyber_ask\ for ambiguous/complex requests
• External LLM can plan multi-step actions using native HA tools
• Parallel tool calls become possible

Closes gaps: multi-step chaining, parallel execution, token efficiency for simple actions.