Add DNS provider for Rainyun/雨云

[Cikaros]

The individual has been tested and is available normally~

[ldez]

Hello, in order for a PR adding a DNS provider to be accepted, you have to:

• add a description to your PR
• be able to maintain this provider
• have a homogeneous design with the other providers
• add tests (units)

make test

• add tests ("live")
  

  lego/providers/dns/cloudflare/cloudflare_test.go

  Lines 125 to 151 in c938de6

  	func TestLivePresent(t *testing.T) {
  	if !envTest.IsLiveTest() {
  	t.Skip("skipping live test")
  	}
  	envTest.RestoreEnv()
  	provider, err := NewDNSProvider()
  	require.NoError(t, err)
  	err = provider.Present(envTest.GetDomain(), "", "123d==")
  	require.NoError(t, err)
  	}
  	func TestLiveCleanUp(t *testing.T) {
  	if !envTest.IsLiveTest() {
  	t.Skip("skipping live test")
  	}
  	envTest.RestoreEnv()
  	provider, err := NewDNSProvider()
  	require.NoError(t, err)
  	time.Sleep(2 * time.Second)
  	err = provider.CleanUp(envTest.GetDomain(), "", "123d==")
  	require.NoError(t, err)
  	}

make test

• add a provider descriptor
• generate CLI help, documentation, and readme.

make generate-dns

• be able to do: (and put the output of this command to a comment in your PR)

rm -rf .lego

RAINYUN_API_KEY="xxxxxxxxxxxxxxxxxxxxx" \
./dist/lego -m your@email.com --dns rainyun -d *.example.com -d example.com -s https://acme-staging-v02.api.letsencrypt.org/directory run

Note the wildcard domain is important.

• pass the linter (golangci-lint must be installed):

make checks

• do go mod tidy

[Cikaros]

// TODO(ldez) based on the API style, this structure is probably wrong.
There's no problem with the JSON field here, because I've tried calling the API and the property is determined to be a big hump and not a small hump.

[Cikaros]

I'm sorry for the irregularity of what I wrote, I rarely write go

[ldez]

Please stop merging, instead rebase your local branch.

[ldez]

To fix your local branch quickly:

git switch master
git branch -D feature/rain-cloud
git switch feature/rain-cloud

[ldez]

Please stop with that: don't merge and don't push your merge.

[Cikaros]

Okay , I`m so sorry

[ldez]

I'm waiting for:

• be able to do: (and put the output of this command to a comment in your PR)

rm -rf .lego

RAINYUN_API_KEY="xxxxxxxxxxxxxxxxxxxxx" \
./dist/lego -m your@email.com --dns rainyun -d *.example.com -d example.com -s https://acme-staging-v02.api.letsencrypt.org/directory run

Note the wildcard domain is important.

You should replace example.com with your domain.
You should replace your@email.com with your email.

The 2 domains with the same LTD are a requirement.