Feature: #99221 - Introduce CLI setup command

See forge#99221

Description

To be able to automate the setup process for new TYPO3 installations, a new CLI command setup is introduced as an alternative to the existing GUI based web installer.

Impact

You can now use ./bin/typo3 setup to set up your TYPO3 installation without needing to run through the web installer.

Example

Interactive / guided setup (questions/answers):

./bin/typo3 setup

Automated setup:

TYPO3_DB_DRIVER=mysqli \
TYPO3_DB_USERNAME=db \
TYPO3_DB_PASSWORD=db \
TYPO3_DB_PORT=3306 \
TYPO3_DB_HOST=db \
TYPO3_DB_DBNAME=db \
TYPO3_SETUP_ADMIN_EMAIL=admin@email.com \
TYPO3_SETUP_ADMIN_USERNAME=admin \
TYPO3_SETUP_PASSWORD=password \
TYPO3_PROJECT_NAME="Automated Setup" \
TYPO3_CREATE_SITE="https://your-typo3-site.example.com/" \
./bin/typo3 setup --force