fix: improve node module installation fallback logic - Fix Issue #106

[dermatz]

This pull request refactors how Node.js dependencies are managed and checked within the Magento theme builder, improving reliability and maintainability. The changes centralize node module management into a dedicated service, enhance the detection of out-of-sync dependencies, and simplify the builder logic by removing duplicate code.

Node modules management improvements:

• Refactored node module installation logic out of the Builder class and into the NodePackageManager service, removing the private installNodeModulesIfMissing method and updating all relevant code paths to use the new service. [1] [2] [3]
• Updated the constructor of the Builder class to inject the NodePackageManager dependency. [1] [2]

Dependency synchronization checks:

• Improved the isNodeModulesInSync method in NodePackageManager to return false when package-lock.json is missing, ensuring that missing lock files are treated as out-of-sync.
• Enhanced the installNodeModules method to attempt npm install as a fallback if npm ci fails, providing better resilience during installation.

Fix Issue #106