doc: add more luarocks types

Author: goldenstein64

types/luarocks/core/path.lua

@@ -11,4 +11,8 @@ function path.rocks_tree_to_string(tree) end
 ---@return string
 function path.deploy_lua_dir(tree) end
 
+---@param tree? string | luarocks.core.Tree
+---@return string
+function path.rocks_dir(tree) end
+
 return path

types/luarocks/core/vers.lua

@@ -0,0 +1,21 @@
+---@meta
+
+---@class luarocks.core.vers.Version
+---@field string string
+---@field revision number
+---@field [number] number
+
+---@class luarocks.core.vers
+local vers = {}
+
+---@param vstring string
+---@return luarocks.core.vers.Version
+---@overload fun(vstring: nil): nil
+function vers.parse_version(vstring) end
+
+---@param a string
+---@param b string
+---@return boolean -- whether `a > b`
+function vers.compare_versions(a, b) end
+
+return vers

types/luarocks/path.lua

@@ -7,6 +7,7 @@ local path = {}
 
 path.rocks_tree_to_string = core_path.rocks_tree_to_string
 path.deploy_lua_dir = core_path.deploy_lua_dir
+path.rocks_dir = core_path.rocks_dir
 
 ---Get the local installation directory (prefix) for a package.
 ---@param name string -- the package name