Migrate project tooling from Node to Bun

[EvandroLG]

This PR migrates from Node/Jest/npm tooling to Bun across the entire repo and include other minor tooling updates.

• Update root and demo to use Bun
• Replace Jest with Bun's test runner
• Update CI to install and run everything through Bun
• Update ESLint to v9
• Update Husky to v9
• Update docs to reflect the changes for humans and LLMs

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Note

Tooling migration to Bun

• CI now uses Bun (oven-sh/setup-bun), runs bun install, bun run typecheck/lint/format:check, and bun test --coverage; build uses bun run build in .github/workflows/main.yml
• Adds Bun artifacts: bun.lock, bunfig.toml; introduces Husky pre-commit hook running Bun tasks (.husky/pre-commit)
• Updates documentation and guidelines to Bun: .cursorrules, CLAUDE.md, README.md, and demo/audio/README.md (commands, testing with bun:test, happy-dom, demo dev servers)
• Removes legacy configs: /.travis.yml, /.eslintrc.cjs; minor .gitignore cleanup

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[Copilot]

Pull request overview

This PR migrates the project's tooling infrastructure from Node.js/Jest to Bun, replacing the test framework, build tools, and development workflow while maintaining the same functionality.

Changes:

• Replaced Jest with Bun's native test runner and updated all test files to use bun:test imports
• Migrated from npm to Bun for package management and script execution
• Replaced webpack with Bun's built-in server for demo applications

Reviewed changes

Copilot reviewed 34 out of 42 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
package.json	Updated scripts to use Bun commands and replaced Jest dependencies with Bun equivalents
test-setup.ts	Added happy-dom global registration for test environment setup
src/audio/tests/Audio.test.ts	Migrated Jest mocks to Bun's mock() and spyOn() API
src/audio/tests/utils.test.ts	Added Bun test imports
src/playlist/tests/AudioPlaylist.test.ts	Migrated Jest test utilities to Bun equivalents
src/playlist/tests/utils.test.ts	Added Bun test imports
src/tests/EventEmitter.test.ts	Replaced Jest mocks with Bun mocks
src/tests/EventHanlder.test.ts	Updated mock creation and removed jest.mock() calls
src/audio/Audio.ts	Removed unused error parameter and replaced ternary with if/else
src/playlist/AudioPlaylist.ts	Replaced ternary with if/else for toggle method
scripts/build.sh	Updated to use bunx instead of direct microbundle execution
bunfig.toml	Added Bun test configuration
.husky/pre-commit	Updated pre-commit hooks to use Bun commands
.github/workflows/main.yml	Migrated CI/CD from Node.js to Bun runtime
eslint.config.mjs	Migrated to flat ESLint config format
demo/audio/server.ts	Added Bun-based development server
demo/playlist/server.ts	Added Bun-based development server
demo/audio/package.json	Replaced webpack with Bun commands
demo/playlist/package.json	Replaced webpack with Bun commands
README.md	Updated documentation to include Bun installation and usage
CLAUDE.md	Updated tooling documentation to reflect Bun migration
.cursorrules	Updated project standards to reflect Bun testing approach

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