Add component-name-in-template-casing: 'PascalCaseNamespaced' about eslint-plugin-vue

[aleksey-hoffman]

This regex workaround would work but it won't autofix the name

'vue/component-name-in-template-casing': ['error', 'PascalCase', {
  ignores: ['/^[A-Z][a-zA-Z]*(\\.[A-Z][a-zA-Z]*)*$/']
},

[waynzh]

I can't reproduce with the example code:
https://ota-meshi.github.io/eslint-plugin-vue-demo/#eJxVjrsKwzAMRX9FaAmUOoaOwWQsFPoJWVxXKYZYNn50Cfn3OikJ7SI49+oIzWj8k7BDlUy0IUOiXEI/sHXBxwwn0AmuPjoYo3fQtHKsIIyvNRPn1Ays5NetVoVMLkw6UyUAtartjUPJG+/JXT9o6qd1KvmTbI78k5Q8LuIZY5koYTfju5A8vhCsHQnLYl8VRifLL+wuy/IBNDFPbA==

[waynzh]

Vue added support for Namespaced Components

But for the Namespaced Component like * as Form, Form.Item is indeed not treated as a Registered Component.
Maybe we can improve this, by treating Form.xxx also as a Registered Component and supporting aufofix? I'd love to hear from maintainers.