Update dependency execa to v9

[renovate]

ℹ️ Note

This PR body was truncated due to platform limits.

This PR contains the following updates:

Package	Change	Age	Confidence
execa	^5.1.1 → ^9.0.0

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Code changes for execa v9 compatibility

execa v9 is ESM-only and changed to named exports. The following files were updated to be compatible:

• bin/build-for-publishing.js: Replaced require('execa') with await import('execa') (dynamic import), made exec() async, and replaced .stdout.pipe(process.stdout) with { stdout: 'inherit', stderr: 'inherit' } option.
• bin/run-browserstack-tests.js: Same pattern — replaced require('execa') with dynamic await import('execa'), made run() async, and replaced .stdout/.stderr.pipe() with { stdout: 'inherit', stderr: 'inherit' }.
• bin/benchmark/utils.mjs: Changed import execa from 'execa' (default import) to import { execa } from 'execa' (named import), since execa v9 removed the default export.

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Release Notes

[github-actions]

📊 Package size report   No changes

File	Before (Size / Brotli)	After (Size / Brotli)
Total (Includes all files)	5.3 MB / 1.3 MB	5.3 MB / 1.3 MB
Tarball size	1.2 MB	-0%↓1.2 MB

_{🤖 This report was automatically generated by pkg-size-action}

[kategengler]

@copilot Make the changes necessary for execa to upgrade

[Copilot]

@copilot Make the changes necessary for execa to upgrade

Done in commit 0c11ed6. The changes needed for execa v9 compatibility:

1. bin/build-for-publishing.js and bin/run-browserstack-tests.js — execa v9 is ESM-only, so require('execa') no longer works. Replaced with await import('execa') inside the async exec/run functions, and replaced the .stdout.pipe(process.stdout) streaming pattern with the { stdout: 'inherit', stderr: 'inherit' } option.

2. bin/benchmark/utils.mjs — Changed import execa from 'execa' (default import) to import { execa } from 'execa' (named import), since execa v9 removed the default export.