feat(lint-configs)!: Set imports_granularity = "Item" in .rustfmt.toml to make import diffs self-contained.

[modelconsumer]

Makes diffs more logical and self-contained.

Description

Checklist

• The PR satisfies the contribution guidelines.
• This is a breaking change and that has been indicated in the PR title, OR this isn't a
  breaking change.
• Necessary docs have been updated, OR no docs need to be updated.

Validation performed

Summary by CodeRabbit

• Chores
  • Updated code formatting configuration standards to adjust import handling settings.

[coderabbitai]

Walkthrough

The Rustfmt configuration file was updated to modify import-related settings. The imports_indent and imports_layout settings were removed, and imports_granularity was changed from "Crate" to "Item".

Changes

Cohort / File(s)	Summary
Rustfmt Configuration exports/lint-configs/.rustfmt.toml	Removed imports_indent and imports_layout settings; changed imports_granularity from "Crate" to "Item" to modify import grouping behaviour.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Title check	✅ Passed	The title clearly describes the main change: setting imports_granularity = "Item" in .rustfmt.toml and its purpose of making import diffs self-contained.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[LinZhihao-723]

For the PR title, how about:

feat(lint-configs): Set `imports_granularity = "Item"` in `.rustfmt.toml` to make import diffs self-contained.