Gravity Flow PDF Generator Extension 3.0.0

- **[BREAKING]** Updated the mpdf extension version. This now requires PHP 8.0 or higher.
- Updated the add-on to use the new [versioning system](https://docs.gravityforms.com/version-numbering/).

- Updated the extension to work with assignee AJAX search and the new conditional routing repeater introduced in Gravity Flow 3.0.0.
- Fixed an issue where the feed settings page is not saving the value for the email routing field.

- Updated the version of mpdf to improve compatibility across PHP versions.
- Updated the feed conditional logic setting so the value is correctly displayed when the page reloads after saving the settings.
- Fixed an issue that causes large queries to run on every admin page.
- Fixed a PHP 8.1 deprecation notice for trim() that occurs when the add-on is activated on a new site.

- Fixed an issue where custom file names with slashes is not sending email attachment to assignees.
- Fixed an issue with custom file name setting not displaying when editing Workflow PDF feeds.

- Added an uninstall message on the Gravity Forms Uninstall Page to clarify what is removed when the PDF extension is uninstalled.
- Fixed an issue with conditional routing when the Send by email setting is active.
- API: Added Gravity Flow PDF extension icon.

- Fixed an issue with merge tags generating links for entries that do not have a PDF file.
- Fixed an issue with merge tags not being applied to the Custom File Name setting during step execution.
- Fixed an issue with conditional routing not loading when the Send by email setting is active.

- Fixed an issue with missing form id and entry id with custom file name generation.
- Fixed an issue with merge tag workflow_pdf_download_link for custom file names.
- Added filter gravityflowpdf_download_file_name to customize the file name downloadable via merge tag.
- Added action gravityflowpdf_generated which fires when the PDF is successfully generated.
- Deprecated filter gravityflowpdf_file_name as part of fix to address the workflow_pdf_download_link merge tag issue. We recommend changing your existing filters to gravityflowpdf_download_file_name as gravityflowpdf_file_name will be removed in a future major release. See release notes for more details.

- Added option to set PDF File Name on the Workflow. Empty field takes the current defined default value.
- Added merge tag support for PDF File Name field.
- Added custom file name setting (enable checkbox + text) to allow customization of PDF file name.
- Added gravityflowpdf_file_name filter call to apply when a custom file name is defined on the workflow step.
- Updated the form settings label to "Workflow PDF".
- Updated mPDF to v8.0.4.
- Fixed an issue with the mPDF include which resulted in a fatal error on some sites.
- Fixed PHP notices thrown in PHP 7.4.

- Added parameters ($entry and $step) to filters gravityflowpdf_mpdf_config and gravityflowpdf_content to enable more granular customization options.
- Added step setting for notifications to identify CC: recipients

- Added support for displaying the first 2,000 users in notification users fields.