refactor: refactor entry-points and commands inside ServiceConfig of parachains and image.star

[abhiyana]

Description:

Commit Message

refactor: refactor entry-points and commands inside ServiceConfig of parachains and image.star

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Changelog Entry

1: Added entrypoint in ServiceConfig of parachain setup.
2: Remove entry points from commands.
3: Added entrypoints and base in the dictionary inside the image.star

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• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have run the unit tests
• I only have one commit (if not, squash them into one commit).
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