Add Profiler mode to fixtures even if React DevTools is not installed

[sebmarkbage]

Currently you need to do one of either:

1. Install React DevTools
2. Install React Refresh
3. Add Profiler component

To opt in to component level profiling.

It was a bit confusing that some of the fixtures was doing 2 which made them work while other was depending on if you had DevTools.

Really React Refresh shouldn't really opt you in I think.

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
react-compiler-playground	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 20, 2024 8:49pm

[react-sizebot]

Comparing: ab27231...1891d2e

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.js	=	6.68 kB	6.68 kB	+0.05%	1.83 kB	1.83 kB
oss-stable/react-dom/cjs/react-dom-client.production.js	=	511.38 kB	511.38 kB	=	91.38 kB	91.38 kB
oss-experimental/react-dom/cjs/react-dom.production.js	=	6.69 kB	6.69 kB	=	1.83 kB	1.83 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js	=	516.17 kB	516.17 kB	=	92.23 kB	92.23 kB
facebook-www/ReactDOM-prod.classic.js	=	593.09 kB	593.09 kB	=	104.45 kB	104.45 kB
facebook-www/ReactDOM-prod.modern.js	=	583.35 kB	583.35 kB	=	102.90 kB	102.90 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

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