feat: clean up `p2p` & implement missing peering functionality #6285

Job	Run time
setup	3s
Run Main (gnodev) / Go Build / generated	8s
Run Main (gnodev) / Go Linter / lint	1m 2s
Run Main (gnodev) / Go Test / test	12s
Run Main (gnogenesis) / Go Linter / lint	6s
Run Main (gnofaucet) / Go Build / generated	9s
Run Main (gnofaucet) / Go Linter / lint	32s
Run Main (gnofaucet) / Go Test / test	11s
Run Main (gnogenesis) / Go Build / generated	10s
Run Main (gnogenesis) / Go Test / test	6s
Run Main (gnokeykc) / Go Build / generated	7s
Run Main (gnokeykc) / Go Linter / lint	49s
Run Main (gnokeykc) / Go Test / test	7s
Run Main (gnomd) / Go Build / generated	8s
Run Main (gnomd) / Go Linter / lint	38s
Run Main (gnomd) / Go Test / test	28s
Run Main (gnomigrate) / Go Build / generated	5s
Run Main (gnomigrate) / Go Linter / lint	11s
Run Main (gnomigrate) / Go Test / test	6s
	5m 18s

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