Make type module mandatory in package json

[sumrender]

Make type module mandatory in package json

This PR closes #30509

Key Changes:

• Adds "type": "module" to all package.json templates across different generators (Angular, React, Vue, JavaScript, Spring Boot)
• Renames multiple .mjs files to .js in the generate-blueprint templates, including:
• Build plugins (define-esbuild, i18n-esbuild)
• Proxy configuration files
• Blueprint CLI commands and generators
• Modifies generator logic to handle the new file naming conventions

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