Feature/ci workflow

[AGiljanovic]

Note that this will be trggered on all branches and check the conformation to the previously agreed conventions and styles.

Setup and Test Job:
* Node.js Environment
* Dependency Management - yarn without altering the lockfile (--frozen-lockfile)
* Linting the code
* Build and Test: this might be a bit redundant because we kind of already have a test CI
* Sec test with audit

Commit Message Validation + Branch Name Validation

• Checking against the previously agreed format

[AGiljanovic]

Added better merge commit handling.

- name: Validate Commit Messages
  run: |
    commit_messages=$(git log --format=%B origin/main..HEAD)
    echo "Checking commit messages: $commit_messages"
    IFS=$'\n'
    for message in $commit_messages; do
      # Checks if the commit message starts with 'Merge'
      if [[ "$message" =~ ^Merge ]]; then
        echo "Skipping merge commit: $message"
      elif ! echo "$message" | grep -Pq '^(ADD:|FIX:|DEL:|UPD:) .+'; then
        echo "Invalid commit message: '$message'"
        echo "Commit messages must start with ADD:, FIX:, DEL., or UPD: followed by a space and text."
        exit 1
      fi
    done
    echo "All commit messages adhere to the specified format."