fix: Fix issue #35402: missing comma in package.json.ejs.t

[omaraymanatia]

Title

fix: Fix issue #35402 - missing comma in package.json.ejs.t

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Proposed changes

The _templates/package/new/package.json.ejs.t file was missing a comma between "dev" and "build-preview", causing a JSON syntax error.
This issue was breaking package installation and script execution.

Fix:

• Added the missing comma to ensure proper JSON syntax.
• The file now works as expected.

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Issue(s)

Fixes #35402

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Steps to test or reproduce

1. Before the fix, running npm install would result in a JSON syntax error.
2. After the fix, npm install and script execution function correctly.

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Further comments

This was a minor syntax issue but had a significant impact on package management. The fix ensures package.json.ejs.t remains valid and functional.

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[NawazTalha]

Hello @omaraymanatia this issue was already fixed by me . You can work on another issues.