fix: Create missing init.py in management folder #774

Job	Run time
postgres (3.9, dj32_cms41.txt)	1m 23s
sqlite (3.9, dj32_cms41.txt)	50s
postgres (3.9, dj40_cms41.txt)	1m 28s
sqlite (3.9, dj40_cms41.txt)	56s
postgres (3.9, dj41_cms41.txt)	1m 27s
sqlite (3.9, dj41_cms41.txt)	50s
postgres (3.9, dj42_cms41.txt)	1m 25s
sqlite (3.9, dj42_cms41.txt)	52s
postgres (3.10, dj32_cms41.txt)	1m 26s
sqlite (3.10, dj32_cms41.txt)	53s
postgres (3.10, dj40_cms41.txt)	1m 39s
sqlite (3.10, dj40_cms41.txt)	51s
postgres (3.10, dj41_cms41.txt)	1m 23s
sqlite (3.10, dj41_cms41.txt)	54s
postgres (3.10, dj42_cms41.txt)	1m 23s
sqlite (3.10, dj42_cms41.txt)	55s
postgres (3.11, dj32_cms41.txt)	1m 26s
sqlite (3.11, dj32_cms41.txt)	52s
postgres (3.11, dj40_cms41.txt)	1m 24s
sqlite (3.11, dj40_cms41.txt)	48s
postgres (3.11, dj41_cms41.txt)	1m 19s
sqlite (3.11, dj41_cms41.txt)	47s
postgres (3.11, dj42_cms41.txt)	1m 24s
sqlite (3.11, dj42_cms41.txt)	56s
cms-develop-sqlite (3.11, dj42_cms41.txt, https://github.com/django-cms/django-cms/archive/develo...	56s
mysql (3.9, dj32_cms41.txt)	1m 31s
mysql (3.9, dj40_cms41.txt)	1m 27s
mysql (3.9, dj41_cms41.txt)	1m 26s
mysql (3.9, dj42_cms41.txt)	1m 27s
mysql (3.10, dj32_cms41.txt)	1m 30s
mysql (3.10, dj40_cms41.txt)	1m 29s
mysql (3.10, dj41_cms41.txt)	1m 28s
mysql (3.10, dj42_cms41.txt)	1m 30s
mysql (3.11, dj32_cms41.txt)	1m 57s
mysql (3.11, dj40_cms41.txt)	1m 26s
mysql (3.11, dj41_cms41.txt)	1m 33s
mysql (3.11, dj42_cms41.txt)	1m 28s
	46m 39s

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