EPS-786: Fixes: Assess code quality with PHP Insights

[vijetaR]

Description

Assess code quality with PHP Insights
Fixes done for php insights run

This pull request includes various changes to improve code quality, enhance functionality, and update documentation. The most important changes include adding a new Grunt task, updating the README file, and making several code improvements in the analytics classes.

Enhancements and new features:

• Gruntfile.js: Added a new copy task to copy files while preserving file mode.

Documentation updates:

• README.md: Updated the "Tested up to" and "Stable tag" versions, and added entries to the changelog for versions 1.6.44, 1.6.45, and 1.6.45.1. [1] [2]

Code improvements and refactoring:

• admin/bsf-analytics/class-bsf-analytics-loader.php: Refactored code to use short array syntax and improved method definitions. [1] [2] [3]
• admin/bsf-analytics/class-bsf-analytics-stats.php: Added a new format_plugin method and refactored existing methods to use short array syntax and null coalescing operators. [1] [2] [3] [4] [5] [6] [7]
• admin/bsf-analytics/class-bsf-analytics.php: Refactored code to use short array syntax, null coalescing operators, and improved method definitions. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12]

Screenshots

Types of changes

Bug fix (non-breaking change which fixes an issue)

How has this been tested?

Checklist:

• My code is tested
• My code passes the PHPCS tests
• My code follows accessibility standards
• My code has proper inline documentation
• I've included any necessary tests
• I've included developer documentation
• I've added proper labels to this pull request