Add UniConsent benchmark with visible banner selector

[jrhe]

Summary

Adds a with-uniconsent benchmark app for UniConsent, configuring CookieBench metadata, visible banner selector, service hosts, and proprietary source/company fields.

Project ID note

Existing external-script benchmarks commit public client-side vendor IDs/config URLs directly in source. This draft follows that shape, but currently uses a placeholder UniConsent project ID. For an upstream-ready benchmark, UniConsent should provide or approve a public benchmark/demo project ID configured for the benchmark host, as I don't have permission to publish the one I have access to.

The private project ID, host, config URL, and test URL used during local validation are not included in this PR. The current placeholder ID loads UniConsent scripts/config but does not render a visible banner locally.

Local UniConsent result

Local UniConsent validation, 20 iterations:

Application	Score	Banner Visibility	Network Impact	Bundle Strategy	Viewport Coverage	FCP	LCP	CLS
UniConsent	61	378ms	394bytes	IIFE Script	36.3%	70ms	389ms	0.001

Category scores from that run:

Category	Score
Performance	83
Bundle Strategy	30
Network Impact	75
Transparency	30
User Experience	55

Notes

• The benchmark mirrors UniConsent's vendor install pattern using native head scripts: synchronous stub scripts first, followed by the async CMP script.
• The synchronous stub script lint suppressions are scoped to those two tags because the UniConsent install snippet requires them before the CMP script.
• The selector targets #uniccmp .unic-bar, the visible bar rendered inside UniConsent's runtime container; #uniccmp itself is a zero-height wrapper.

Validation

• pnpm --filter with-uniconsent fmt
• pnpm --filter with-uniconsent lint
• pnpm --filter with-uniconsent exec tsc --noEmit --project tsconfig.json
• pnpm --filter with-uniconsent build

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[jrhe]

@BurnedChris dropping this here incase you want to add UniConsent to the benchmark. Would need a uniconsent sub though unfortunately, unless you want to add my results to the page and then caveat with third party/user submitted.

c15t is a breath of fresh air compared to other CMPs. Really didn't understand the big fuss when hearing you talk about it at a Vercel event as I'd never had to implement them myself. DX is top!