Add e2e tests for gRPC requests and CLI commands (#13)

- Add E2E tests following pattern suggested in cosmos-sdk docs:
  https://docs.cosmos.network/v0.50/build/building-modules/testing#end-to-end-tests
  - Tests for gRPC requests
  - Tests for manually configured CLI commands
- Add a CI workflow to run these E2E tests

Reviewed-on: deep-stack/laconic2d#13
Co-authored-by: Prathamesh Musale <prathamesh.musale0@gmail.com>
Co-committed-by: Prathamesh Musale <prathamesh.musale0@gmail.com>

x/bond/keeper/msg_server.go

@@ -26,7 +26,8 @@ func (ms msgServer) CreateBond(c context.Context, msg *bond.MsgCreateBond) (*bon
 	if err != nil {
 		return nil, err
 	}
-	_, err = ms.k.CreateBond(ctx, signerAddress, msg.Coins)
+
+	resp, err := ms.k.CreateBond(ctx, signerAddress, msg.Coins)
 	if err != nil {
 		return nil, err
 	}
@@ -44,7 +45,7 @@ func (ms msgServer) CreateBond(c context.Context, msg *bond.MsgCreateBond) (*bon
 		),
 	})
 
-	return &bond.MsgCreateBondResponse{}, nil
+	return &bond.MsgCreateBondResponse{Id: resp.Id}, nil
 }
 
 // RefillBond implements bond.MsgServer.