Support `yaml-language-server: $schema=` Comments

[Fleshgrinder]

Many YAML files don't allow $schema properties and it's thus necessary to manually configure the schemas in ESLint. It would be nice to have support for the https://github.com/redhat-developer/yaml-language-server comment, which isn't only supported in Visual Studio Code but also in the JetBrains products.

# yaml-language-server: $schema=https://json-schema.org/draft-07/schema

# yaml-language-server: $schema=../custom.schema.json

[ota-meshi]

Thank you for the feature request!
That sounds good to me.