chore(lint): Use shared eslint config

[fb55]

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[Copilot]

Pull request overview

This pull request migrates the project from an older ESLint configuration to a shared @feedic/eslint-config, adds Biome for formatting and linting, and upgrades ESLint from v8 to v10. The PR applies automated fixes for various linting rules including variable naming conventions, import style changes, and code simplifications.

Changes:

• Replaced .eslintrc.json with flat config eslint.config.mjs using shared @feedic/eslint-config
• Added Biome for formatting (replacing Prettier) with configuration in biome.json
• Updated dependencies: ESLint v8→v10, removed Prettier, added typescript-eslint v8.56.0, added Biome v2.4.4
• Applied auto-fixes: renamed variables (prev→previous, i→index, el→element, err→error), changed imports to node: prefix, replaced Object.prototype.hasOwnProperty with Object.hasOwn, converted forEach to for-of loops

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
eslint.config.mjs	New flat ESLint configuration using shared config with TypeScript support
biome.json	New Biome configuration for formatting and linting
.eslintrc.json	Removed old ESLint configuration file
package.json	Updated dependencies, reordered exports, reorganized scripts, added "type": "commonjs"
package-lock.json	Lockfile updates for new dependencies
src/node.ts	Variable renaming, Object.hasOwn usage, forEach→for-of conversions
src/node.spec.ts	Variable renaming, import type annotations, Number.NaN usage
src/index.ts	Import reordering with type imports, variable renaming
src/index.spec.ts	Node: prefix for built-in imports, forEach→for loop conversion, variable renaming

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