[FEAT] Add semantic-release for automated versioning and changelog

[axelhamil]

The project already uses conventional commits via @commitlint/cli and @commitlint/config-conventional. This provides the foundation for semantic-release.

Integrate https://semantic-release.gitbook.io/ to automate:

• Version bumping based on commit messages
• CHANGELOG.md generation
• GitHub releases creation
• Git tag creation

TASK

• Install semantic-release and plugins (@semantic-release/changelog, @semantic-release/git, @semantic-release/github)
• Create .releaserc.json configuration
• Add GitHub Actions workflow for release on main branch
• Configure GITHUB_TOKEN / NPM_TOKEN secrets if needed
• Update README with release process documentation

Configuration Example

{
"branches": ["main"],
"plugins": [
"@semantic-release/commit-analyzer",
"@semantic-release/release-notes-generator",
"@semantic-release/changelog",
"@semantic-release/github",
["@semantic-release/git", {
"assets": ["CHANGELOG.md", "package.json"],
"message": "chore(release): ${nextRelease.version} [skip ci]"
}]
]
}