refactor: add braces to single-line if statements in cli args

[Kushaal-k]

Closes #435

Summary

Added braces to single-line if statements in src/cli/args.ts to match the project's formatting conventions.

What changed

• Added braces to single-line if statements
• Moved conditional bodies onto separate lines
• Kept all logic and behavior unchanged

Validation

• Ran npm run build
• Ran npm test
• Confirmed all tests still pass

Notes

This is a pure formatting refactor with no intended behavior changes.

[sonukapoor]

Mechanical but needed - all the single-line if statements in args.ts now have braces and the logic is unchanged throughout.

One thing before this can merge: the branch is behind main. Could you rebase against main and force-push?

[sonukapoor]

Thank you for your contribution @Kushaal-k. 💯