Add schedule for code quality workflow #1294

Job	Run time
test / Get base test matrix	2s
test / Prepare matrix for functional tests	3s
test / Prepare matrix for unit tests	5s
test / Functional - WP ${{ matrix.wp }} on PHP ${{ matrix.php }} with ${{ (((matrix.dbtype != 'sqlite') && matrix.mysql) \|\| 'SQLite') }}${{ ((matrix.coverage && ' (with coverage)') \|\| '') }} ${{ ((startsWith(matrix.os, 'windows') && '(Windows)') \|\| '') }} ${{ ((startsWith(matrix.os, 'macos') && '(macOS)') \|\| '') }}	0s
test / Unit test / PHP 8.3	23s
test / Unit test / PHP 7.4	40s
test / Unit test / PHP 8.4	20s
test / Unit test / PHP 7.2	45s
test / Unit test / PHP 7.3	48s
test / Unit test / PHP 8.2	17s
test / Unit test / PHP 8.0	40s
test / Unit test / PHP nightly	21s
test / Unit test / PHP 8.1	42s
test / Unit test / PHP 8.5 (with coverage)	23s
	5m 29s

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