ESLint Plugin v0.17

[kireevmp]

This PR is a complete rewrite of the plugin in TypeScript with type safety and modern tooling. This also adds native support (flat config) for ESLint v9.

Changes

Core

• Migrated the entire codebase from JavaScript to TypeScript
• Now uses tsdown for bundling code and providing public type definitions (package passes publint & attw)
• 18 out of 19 rules reimplemented from the ground up using modern @typescript-eslint APIs
• Updated supported NodeJS versions to ^20.9.0 || >=21.1.0

Documentation

• Upgraded documentation to VitePress v2
• Implemented dynamic routes for rules (markdown is now colocated with rule implementation)

Testing

• Replaced Jest with Vitest v4
• Migrated all test examples into test files
• Switched to @typescript-eslint/rule-tester for all rule tests

Rule Changes

• prefer-sample-over-forward-with-mapping: removed in favor of existing no-forward rule
• no-forward: promoted from future to recommended
• no-guard: promoted from future to recommended

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