fix(create-qwik): add missing execa dependency

[JerryWu1234]

After PR #8103 migrated from CJS to ESM, the execa package was marked as external in the esbuild config but was not declared as a dependency in create-qwik's package.json.

This caused 'Cannot find package execa' error when running: npx [email protected]

Fixes the runtime error by adding execa to dependencies.

What is it?

• Feature / enhancement
• Bug
• Docs / tests / types / typos
• Infra

Description

Checklist

• My code follows the developer guidelines of this project
• I performed a self-review of my own code
• I added a changeset with pnpm change
• I made corresponding changes to the Qwik docs
• I added new tests to cover the fix / functionality

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Latest commit: 28fcb8a

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[JerryWu1234]

[wmertens]

The only place execa is used is in https://github.com/QwikDev/qwik/blob/build/v2/packages/qwik/src/cli/utils/run-build-command.ts

I think the correct fix is to mark execa as noExternal for qwik/create-qwik so that it is tree shaken and less deps need to be installed before creating a new qwik app.

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npm i https://pkg.pr.new/QwikDev/qwik/@qwik.dev/core@8196

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npm i https://pkg.pr.new/QwikDev/qwik/create-qwik@8196

commit: 28fcb8a

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[JerryWu1234]

The only place execa is used is in https://github.com/QwikDev/qwik/blob/build/v2/packages/qwik/src/cli/utils/run-build-command.ts

I think the correct fix is to mark execa as noExternal for qwik/create-qwik so that it is tree shaken and less deps need to be installed before creating a new qwik app.

Due to the CJS dynamic require() in execa's dependency chain, it cannot be bundled into an ESM bundle.
The only solution is:
Keep execa in the external list (don't bundle it)
Declare it as a dependency in package.json
This way, npm/pnpm will automatically install execa and its dependencies when users install create-qwik.