feat: re-implement CI/CD and release workflows #12

Job	Run time
Conventional Commits	19s
Validate PR title	0s
UI lint	52s
Proto (generate + git diff)	1m 22s
UI test	1m 20s
Go unit-tests	-1s
Go lint	-1s
Build (gitops, gitops-server)	0s
Go fmt	-1s
Goreleaser (gitops CLI)	0s
Build and push Helm chart	0s
Build and push gitops-server image	0s
	3m 50s

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