refactor: pass around &str instead of &[u8]

[kdkasad]

Closes #10.

[github-actions]

Test Results

41 tests   41 ✅  0s ⏱️
 3 suites   0 💤
 1 files     0 ❌

Results for commit 72e2293.

[Copilot]

Pull Request Overview

Refactor to use &str instead of &[u8] for the code parameter across rules, helpers, tests, and the main application.

• Updated Rule::check signatures and callsites to accept &str.
• Removed redundant UTF-8 conversions, using direct slicing or .as_bytes() where needed.
• Adjusted all test cases and helper functions to pass &str.

Reviewed Changes

Copilot reviewed 20 out of 20 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/rules/rule12a.rs	Updated check signature and test helper invocation to &str.
src/rules/rule11e.rs	Updated check signature to accept &str.
src/rules/rule11b.rs	Removed UTF-8 conversion, updated signature, and tests.
src/rules/rule11a.rs	Removed UTF-8 conversion, updated signature, and tests.
src/rules/rule03f.rs	Changed check signature to accept &str.
src/rules/rule03e.rs	Changed signature and removed UTF-8 conversion.
src/rules/rule03d.rs	Signature changes, replaced UTF-8 conversions, updated slicing.
src/rules/rule03c.rs	Signature change and updated byte comparisons.
src/rules/rule03b.rs	Signature change and updated spacing helper.
src/rules/rule03a.rs	Signature change and updated message formatting.
src/rules/rule02b.rs	Signature change and test updates.
src/rules/rule02a.rs	Signature change, removed UTF-8 conversions, updated helper.
src/rules/rule01d.rs	Signature change and updated error message slicing.
src/rules/rule01c.rs	Signature change, replaced utf8_text with slicing.
src/rules/rule01b.rs	Signature change.
src/rules/rule01a.rs	Signature change and slicing in suggestions.
src/rules/api.rs	Updated Rule trait signature.
src/main.rs	Updated invocation of rule.check to pass &code.
src/helpers/testing.rs	Updated QueryHelper::new invocation to accept &str.
src/helpers/mod.rs	Changed QueryHelper::new signature and code storage.