[syntax] Package name comment does not show up

[zivkovicmilos]

Description

Master issue: #13

The package name is not syntax highlighted.
The comment associated with the package also does not show up.

Code:

// This is a package comment
package main

Screenshot:

Expected behavior (Go extension):

[kazai777]

partially fixed with this pr, the hover is not complete, but I think it comes from gnopls.

• fix: syntax highlighting #24