Fix: Resolve ESLint Console Error and Implement Flat Config

[AmpasTheodoros]

Problem Solved:

• Addressed the persistent console error in ESLint due to environment and global settings not being recognized properly

Solution Implemented:

• Converted the ESLint configuration to use the flat config system which is compatible with the current ESLint version
• Added languageOptions to define global variables and rules ensuring console is recognized as a global
• Disabled the no-console and no-undef rules to allow console statements without errors

Trade-offs or Limitations:

• The flat config system requires a different approach to configuration which may not be familiar to all developers
• This change assumes that the project will continue using ESLint's flat config system which might require further adjustments if ESLint's configuration approach changes in the future