[crud] Narrow resource type

[poteto]

Small refactor to the resource type to narrow it to an arbitrary object or void/null instead of the top type. This makes the overload on useEffect simpler since the return type of create is no longer widened to the top type when we merge their definitions.

Stack created with Sapling. Best reviewed with ReviewStack.

• [crud] Remove useResourceEffect #32206
• [crud] Merge useResourceEffect into useEffect #32205
• [crud] Rename useResourceEffect flag #32204
• -> [crud] Narrow resource type #32203

[react-sizebot]

Comparing: de1eaa2...3470cd1

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	=	514.24 kB	514.24 kB	=	91.73 kB	91.74 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	=	557.28 kB	557.28 kB	=	98.97 kB	98.97 kB
facebook-www/ReactDOM-prod.classic.js	=	595.79 kB	595.70 kB	=	104.85 kB	104.83 kB
facebook-www/ReactDOM-prod.modern.js	=	586.21 kB	586.12 kB	=	103.30 kB	103.28 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

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