feat: add tool approval state and tool approval component

[tobiasbueschel]

Here is an implementation approach that brings in the new approval states to the tool component and also adds a new <ToolApproval /> component.

Resolves #154

[vercel]

@tobiasbueschel is attempting to deploy a commit to the Vercel Team on Vercel.

A member of the Team first needs to authorize it.

[socket-security]

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

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​vitest/​coverage-v8@​4.0.1 ⏵ 4.0.4				+1
	vitest@​4.0.1 ⏵ 4.0.4	+1		+1	+1
	@​types/​node@​24.3.1
	@​tailwindcss/​postcss@​4.1.15 ⏵ 4.1.16
	ai@​5.0.81 ⏵ 5.1.0-beta.22	+1

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[haydenbleasel]

@tobiasbueschel This is excellent. Going to merge then rework a little on main before it goes out. Great stuff 💪