Support `@type` and `@import-type` type aliases

[Ben Mewburn]

• @type
• @import-type
• Type substitution
• References . Refs for name, alias, from class, and type definition .
• Completion . Suggestions for imported type, from class, type definition, alias/name as type in other annotations.
• Rename. Import alias and type itself.
• Go to definition.
• optimisations
• recursive substitution

[Andres Kalle]

Hi, is this feature documented somewhere?