feat: integrate marketplace tools with runtime

[h1177h]

变更内容

本 PR 新增 marketplace tools 与 runtime 的集成能力，使 runtime 可以安装、绑定并刷新 marketplace artifact。

主要包括：

• 新增 marketplace tools，用于 list/get/versions/install/bind/uninstall 等操作
• runtime 启动时注册 marketplace tools
• 新增安装后集成逻辑，支持 skill、agent、CLI artifact 写入 runtime 可用位置
• 新增 hot reload coordinator，用于按 runtime/session/agent/workspace/project/global 范围刷新
• runtime pool 支持按不同范围刷新实例
• RefreshToolRegistry 支持重新同步 marketplace tools
• 补充 runtime marketplace integration 和 markettools 测试

测试

go test ./pkg/runtime ./pkg/capability/markettools

[fennoai]

I found 2 behavioral issues in the marketplace/runtime integration.

[codecov]

Codecov Report

❌ Patch coverage is 65.97325% with 229 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
pkg/runtime/market_integration.go	50.75%	92 Missing and 38 partials ⚠️
pkg/capability/markettools/marketplace.go	83.08%	28 Missing and 18 partials ⚠️
pkg/runtime/hot_reload.go	58.82%	26 Missing and 9 partials ⚠️
pkg/runtime/pool.go	25.00%	15 Missing ⚠️
pkg/runtime/tools_refresh.go	85.71%	1 Missing and 1 partial ⚠️
pkg/runtime/marketplace_store.go	83.33%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!