feat(manager): add `GitManager` (#1268) #2596

Job	Run time
prepare-win32	5m 10s
prepare	1m 10s
prettier	57s
e2e-cypress	6m 38s
packages (@slicemachine/plugin-kit)	1m 17s
e2e (1/8)	4m 31s
packages (@slicemachine/manager)	2m 25s
e2e (2/8)	4m 20s
packages (@slicemachine/init)	1m 27s
e2e (3/8)	6m 35s
packages (slice-machine-ui)	2m 38s
e2e (4/8)	3m 37s
packages (start-slicemachine)	1m 16s
packages (@slicemachine/adapter-next)	1m 43s
e2e (5/8)	7m 47s
packages (@slicemachine/adapter-nuxt)	1m 31s
e2e (6/8)	4m 55s
packages (@slicemachine/adapter-nuxt2)	1m 22s
e2e (7/8)	6m 29s
packages (@slicemachine/adapter-sveltekit)	1m 25s
e2e (8/8)	4m 39s
packages (@slicemachine/e2e)	1m 11s
packages-win32 (@slicemachine/plugin-kit)	2m 31s
packages-win32 (@slicemachine/manager)	3m 55s
packages-win32 (@slicemachine/init)	2m 26s
packages-win32 (slice-machine-ui)	3m 15s
packages-win32 (start-slicemachine)	2m 24s
packages-win32 (@slicemachine/adapter-next)	2m 34s
packages-win32 (@slicemachine/adapter-nuxt)	2m 33s
packages-win32 (@slicemachine/adapter-nuxt2)	2m 33s
packages-win32 (@slicemachine/adapter-sveltekit)	2m 39s
e2e-merge-reports	50s
	1h 38m 43s

Provide feedback