docs: add dedupe package documentation and comparison table (#372)

* docs: add dedupe package documentation and comparison table to notable packages guide

* docs: update dedupe description and improve comparison table with avoid_duplicate_code

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Co-authored-by: Illia Aihistov <illia.aihistov-us@solid.software>

Refactor/simplify avoid duplicate code (#348)

* feat: implement exact hash tracking and literal analysis to improve duplicate code detection accuracy

* fix: handle FileSystemException in readFileContent to prevent crashes from TOCTOU race conditions

* refactor: replace manual iteration with generic IterableUtils.iterate in token utilities

* refactor: simplify isCandidateIgnored by using collection-if and spread operators for token collection

* refactor: replace groupBy with manual loop to optimize duplicate grouping in CrossFileMatchIterableExtension

* refactor: use record destructuring and switch expressions to simplify duplicate report generation

* refactor: update CrossFileMatch to use Sets for duplicates and optimize hash grouping logic

* refactor: simplify diagnostic reporting logic by using a nullable argument instead of a list

* refactor: remove token count guard in global hash registry to detect duplicates with varying literal values

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Co-authored-by: Illia Aihistov <illia.aihistov-us@solid.software>

set upcoming version 0.3.1

0.2.1-0.2.2

Fixed LintCode analyzer issues (#178)

* Fixed analyzer issue, fixed linter

* Fixed LintCode issue

* Fixed LintCode issue

* Fixed pubspec

* Try to update analyzer version

* Try to override analyzer dependency

* Add import as instead of hide

* Fixed tests fpr custom linter to work correctly

Fixed analyzer issue, fixed linter (#177)

0.2.0