support to load swaggers from an extension (#639) #383

Job	Run time
Test	1m 49s
goreleaser	0s
BuildDesktop (ubuntu-latest)	3m 13s
image	29m 56s
BuildDesktop (windows-latest)	16m 45s
BuildDesktop (macos-latest)	2m 33s
BuildDesktop (macos-13)	3m 40s
	57m 56s

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