[BP: release/v4 <- #118] rename: router -> packetforward

[mergify]

This is an automatic backport of pull request #118 done by Mergify.
Cherry-pick of 47f2ae0 has failed:

On branch mergify/bp/release/v4/pr-118
Your branch is up to date with 'origin/release/v4'.

You are currently cherry-picking commit 47f2ae0.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   middleware/packet-forward-middleware/README.md
	modified:   middleware/packet-forward-middleware/docs/integration.md
	renamed:    middleware/packet-forward-middleware/router/types/expected_keepers.go -> middleware/packet-forward-middleware/packetforward/types/expected_keepers.go
	renamed:    middleware/packet-forward-middleware/router/types/forward.go -> middleware/packet-forward-middleware/packetforward/types/forward.go
	renamed:    middleware/packet-forward-middleware/router/types/genesis.go -> middleware/packet-forward-middleware/packetforward/types/genesis.go
	renamed:    middleware/packet-forward-middleware/router/types/keys.go -> middleware/packet-forward-middleware/packetforward/types/keys.go
	renamed:    middleware/packet-forward-middleware/router/types/params.go -> middleware/packet-forward-middleware/packetforward/types/params.go
	deleted:    middleware/packet-forward-middleware/proto/router/v1/genesis.proto
	deleted:    middleware/packet-forward-middleware/proto/router/v1/query.proto
	deleted:    middleware/packet-forward-middleware/router/client/cli/cli.go
	deleted:    middleware/packet-forward-middleware/router/ibc_middleware.go
	deleted:    middleware/packet-forward-middleware/router/keeper/genesis.go
	deleted:    middleware/packet-forward-middleware/router/keeper/grpc_query.go
	deleted:    middleware/packet-forward-middleware/router/keeper/keeper.go
	deleted:    middleware/packet-forward-middleware/router/keeper/params.go
	deleted:    middleware/packet-forward-middleware/router/module.go
	deleted:    middleware/packet-forward-middleware/router/module_test.go
	deleted:    middleware/packet-forward-middleware/router/types/forward_test.go
	deleted:    middleware/packet-forward-middleware/router/types/genesis.pb.go
	deleted:    middleware/packet-forward-middleware/router/types/query.pb.go
	deleted:    middleware/packet-forward-middleware/router/types/query.pb.gw.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   middleware/packet-forward-middleware/Makefile
	both modified:   middleware/packet-forward-middleware/packetforward/client/cli/cli.go
	both modified:   middleware/packet-forward-middleware/packetforward/ibc_middleware.go
	both modified:   middleware/packet-forward-middleware/packetforward/keeper/genesis.go
	both modified:   middleware/packet-forward-middleware/packetforward/keeper/grpc_query.go
	both modified:   middleware/packet-forward-middleware/packetforward/keeper/keeper.go
	both modified:   middleware/packet-forward-middleware/packetforward/keeper/params.go
	both modified:   middleware/packet-forward-middleware/packetforward/module.go
	both modified:   middleware/packet-forward-middleware/packetforward/module_test.go
	both modified:   middleware/packet-forward-middleware/packetforward/types/forward_test.go
	both modified:   middleware/packet-forward-middleware/packetforward/types/genesis.pb.go
	both modified:   middleware/packet-forward-middleware/packetforward/types/query.pb.go
	both modified:   middleware/packet-forward-middleware/packetforward/types/query.pb.gw.go
	both modified:   middleware/packet-forward-middleware/proto/packetforward/v1/genesis.proto
	both modified:   middleware/packet-forward-middleware/proto/packetforward/v1/query.proto
	both modified:   middleware/packet-forward-middleware/scripts/protocgen.sh
	both modified:   middleware/packet-forward-middleware/test/mock/bank_keeper.go
	both modified:   middleware/packet-forward-middleware/test/mock/channel_keeper.go
	both modified:   middleware/packet-forward-middleware/test/mock/distribution_keeper.go
	both modified:   middleware/packet-forward-middleware/test/mock/transfer_keeper.go
	both modified:   middleware/packet-forward-middleware/test/setup.go

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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