SemanticTokenTypes.type is ambigious

I think type might mean either of these three different things:

• type alias, like type Foo = (); or typedef int uint32_t;
• type reference, like let x: (i32, i32) = (0, 0) or int x = 92;
• type as a modifier: structs, interfaces, enums are “types”

I suggest renaming it to typeAlias / typedef, as that is much more specific, and probably the most useful one.

[aeschli]

type is intended to be the super type of all types. In VSCode we map type to TextMate scope entity.name.type We can also add typeAlias, if there are multiple languages can use it. But that said, language servers are free to come up with their own custom token types. The plan is to introduce a naming convention for custom token types such astype>typeAlias to signal that typeAlias is extending type.

[dbaeumer]

There are documented here https://github.com/microsoft/vscode-languageserver-node/blob/master/protocol/src/common/protocol.semanticTokens.ts#L18 and in the 3.16.0 spec. I will add something for the type value.