Support dual releases

[jakejackson1]

Add two separate build processes:

1. Canonical
2. WP.org

Adjust the main slug and translation domain from gravity-forms-pdf-extended to gravity-pdf.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 79.22948% with 124 lines in your changes missing coverage. Please review.

Project coverage is 77.74%. Comparing base (9a6f65f) to head (4eec6df). Report is 4 commits behind head on development.

Files with missing lines	Patch %	Lines
src/Helper/Licensing/EDD_SL_Plugin_Updater.php	0.00%	69 Missing :warning:
src/Helper/Helper_Abstract_Options.php	91.76%	7 Missing :warning:
src/bootstrap.php	0.00%	7 Missing :warning:
src/View/View_Settings.php	45.45%	6 Missing :warning:
src/Helper/Helper_Options_Fields.php	96.55%	4 Missing :warning:
src/Helper/Helper_Abstract_Addon.php	0.00%	3 Missing :warning:
src/Helper/Helper_PDF_List_Table.php	84.21%	3 Missing :warning:
src/Rest/Rest_Form_Settings.php	85.00%	3 Missing :warning:
src/Controller/Controller_Custom_Fonts.php	80.00%	2 Missing :warning:
src/Model/Model_Form_Settings.php	86.66%	2 Missing :warning:
... and 13 more

Additional details and impacted files

```diff @@ Coverage Diff @@ ## development #1582 +/- ## =============================================== - Coverage 77.82% 77.74% -0.08% =============================================== Files 255 255 Lines 13909 13925 +16 Branches 370 370 =============================================== + Hits 10824 10826 +2 - Misses 3077 3091 +14 Partials 8 8 ```

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