First installation without Composer
1. Extract the files from the package to the Magento 2 root directory (or use composer)
2. Run the following command:
| bin/magento setup:upgrade |
3. Install the requirement (with composer):
| composer require blackbird/extensions-core |
3. or install it by unzip the archive directly from github : https://github.com/blackbird-agency/extensions-core/archive/refs/heads/main.zip and extract it to app/code/Blackbird/ExtensionsCore .