Refactor trainee_tasks: Extract assets, clean code structure, and update layouts

[Paulopk0]

Description

Comprehensive refactoring of the trainee_tasks module to improve codebase organization, decouple front-end logic from PHP, optimize third-party library loading, and expand the main table functionality with new data fields.

Changes

• Asset Optimization: Removed obsolete local library files (jquery.min.js, bootstrap.min.css, etc.) and replaced them with global standardized sources.
• Separation of Concerns:
  • Extracted table manipulation JavaScript into trainee_tasks.js.
  • Created bootstrap.php to handle shared visual component classes and CSS bootstrapping.
• New Backend Features:
  • Added trainee_tasks_language_helper.php and introduced dynamic JSON configuration via tasks.programming.languages.json to manage task programming languages.
• Layout Enhancements:
  • Refactored display layouts in index.php and public.php to include grouped data links, an icon-based languages column, and tracked activity hours (HRS).
  • Migrated layout utilities to trainee_tasks_styles.css.
• Code Cleanups: Dropped .php extensions from internal navigation links and normalized the local environment loader in conexao.php.