feat: add pcm_search_cyclist tool

[mpicciolli]

Summary

• Adds pcm_search_cyclist tool to search for cyclists by first name and/or last name (case-insensitive partial match, up to 10 results)
• Returns all ratings (plain, mountain, medium mountain, downhilling, cobble, time trial, prologue, sprint, acceleration, endurance, resistance, recuperation, hill, baroudeur, current ability) and the resolved country name
• mediumMountain and currentAbility are gracefully handled as null on older saves that pre-date those columns (detected via PRAGMA table_info)
• Updates README.md and AGENTS.md to document the new tool

[Copilot]

Pull request overview

Adds a new MCP tool, pcm_search_cyclist, to search cyclists in PCM .cdb saves by name and return key ratings plus resolved country name, with compatibility handling for older save schemas.

Changes:

• Introduces pcm_search_cyclist tool backed by a SQL query over DYN_cyclist, returning up to 10 matches and handling missing columns via PRAGMA table_info.
• Registers the new tool in the tool registry.
• Updates README.md and AGENTS.md to document the new tool.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
src/tools/search-cyclist.ts	New tool implementation for cyclist search + schema compatibility handling.
src/tools/index.ts	Registers registerSearchCyclist so the new tool is available.
README.md	Documents pcm_search_cyclist in the tool list.
AGENTS.md	Documents the new tool in layout and tool table.

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