chore: update dependencies (gui-chat-protocol ^2.1.0)

[isamu]

Summary

• gui-chat-protocol → ^2.1.0 (additive: ToolResult.sequence, ToolContext.userSpokeAt, createSequenceKeeper). No source change needed.
• Other dependencies bumped to latest; lockfile deduplicated with yarn-deduplicate.
• Held within the current range (no major bump): typescript (unified at ~6.0.3; TS 7 breaks the toolchain), openai, eslint-plugin-unicorn, eslint-plugin-sonarjs, which, three-mesh-bvh — where present.
• Plugin version is not changed; publishing is separate.

package	section	before	after
gui-chat-protocol	devDependencies	^2.0.0	^2.1.0
gui-chat-protocol	peerDependencies	^2.0.0	^2.1.0

Items to Confirm / Review

• Any (major) row above: verified only by yarn lint, yarn build, yarn typecheck after a clean yarn install --frozen-lockfile; the demo was not run in a browser.
• yarn audit: 0 vulnerabilities found - Packages audited: 221

User Prompt

• ~/ss/llm/GUIChatPlugins/ 以下で依存変更が必要なものを、純粋な依存更新も含めて全部更新する（CI green なら merge まで）。

🤖 Generated with Claude Code

work in gui-chat-protocol

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	gui-chat-protocol@​2.0.0 ⏵ 2.1.0	+9		+1	-1

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