New: implements PSR-4 Autoloading Standard for Improved Code Structure and Maintainability

[alexmigf]

closes #563

• Refactored files to follow PSR-4 autoloading standards
• Updated namespaces to better match directory structure
• Modified composer.json for PSR-4 autoloading
• Ensured backward compatibility for legacy classes and namespaces
• Renamed functions file and moved to plugin root directory
• Configured Strauss to prefix vendor namespaces

Note:

Strauss doesn't correctly apply the new namespace to the FontLib class variables, so a manual fix is needed to ensure proper font subsetting functionality. Fix applied here: 4643b01

[dwalkerpriv]

Normal functions seem to work fine 👍 . I tested:

• All document generation
• Document uploads
• Auto and manual creation
• Document attachments

Didn't notice any slow downs, nor any errors in the logs

[dpeyou]

LGTM now, I cannot find any errors 🚀

[dwalkerpriv]

I've been using this since Monday I believe. Havent had any issues with the normal functions of plugin nor with the compatibility of the PT or Pro

[BrunoPavlinic98]

LGTM!
The code looks OK.
I have tested various different IPS functionalities without any issues. I will keep my free plugin branch on this one for some time just to test this while working on another tasks.

[YordanSoares]

I've been testing this PR since last Wednesday, after the weekly meeting, and haven't gotten any issues so far. I have tested this with Professional, Premium Templates and, mPDF, and everything seems to be working correctly.

Within the testing, I took advantage to check a reported conflict with dompdf caused by “TI WooCommerce Wishlist Premium” (see the issue reports here), and I can confirm that this is solved in this PR.

[MohamadNateqi]

Works great!

[Terminator-Barbapapa]

🚀

[szepeviktor]

Well done.
Here is how to check FQCN~filesystem matching.

$ composer dump-autoload --optimize --strict-psr
Generating optimized autoload files
Generated optimized autoload files containing 295 classes

[alexmigf]

@szepeviktor we are running Strauss; Composer is handled by it.