[CLI IMPROVEMENT] improved cli message for new cmd

[tanbirali]

Purpose

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Fixes #43428

Approach

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This is a Draft PR to understand if I am heading in the right direction.

Samples

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Remarks

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Check List

• Read the Contributing Guide
• Updated Change Log
• Checked Tooling Support (#)
• Added necessary tests
  • Unit Tests
  • Spec Conformance Tests
  • Integration Tests
  • Ballerina By Example Tests
• Increased Test Coverage
• Added necessary documentation
  • API documentation
  • Module documentation in Module.md files
  • Ballerina By Examples

[CLAassistant]

All committers have signed the CLA.

[azinneera]

@tanbirali Thank you for the contribution. The changes you've made so far look great. Can you also address the rest of the changes to the bal new command, bal build and bal pack commands as mentioned in the issue? You will also have to fix the test cases related to these commands.