fix(lua): generate explicit overloads for vim.fn

The generated vim.fn stubs represent overloads as repeated function
declarations. EmmyLua merges their return types, so getline(lnum) is
inferred as string|string[] even though it always returns a string.

Generate one declaration with @overload annotations from the existing
__N entries, while keeping separate Vimdoc signatures. Parenthesize the
overload return list so types such as (0|-1)[] remain arrays.

Correct getline()'s single-line and range signatures, and add typed
getqflist() signatures for its entry-list and property-query forms. This
lets callers infer quickfix results without local type overrides.

AI-assisted

0 files changed, 0 insertions, 0 deletions