docs(annotations): added ---@generic support

runtime/lua/vim/_meta/vimfn.lua

@@ -1147,8 +1147,9 @@ function vim.fn.confirm(msg, choices, default, type) end
 --- A |Dictionary| is copied in a similar way as a |List|.
 --- Also see |deepcopy()|.
 ---
---- @param expr any
---- @return any
+--- @generic T
+--- @param expr T
+--- @return T
 function vim.fn.copy(expr) end
 
 --- Return the cosine of {expr}, measured in radians, as a |Float|.
@@ -1308,9 +1309,10 @@ function vim.fn.debugbreak(pid) end
 --- {noref} set to 1 will fail.
 --- Also see |copy()|.
 ---
---- @param expr any
+--- @generic T
+--- @param expr T
 --- @param noref? boolean
---- @return any
+--- @return T
 function vim.fn.deepcopy(expr, noref) end
 
 --- Without {flags} or with {flags} empty: Deletes the file by the
@@ -4769,7 +4771,7 @@ function vim.fn.isnan(expr) end
 --- cases, items() returns a List with the index and the value at
 --- the index.
 ---
---- @param dict any
+--- @param dict table
 --- @return any
 function vim.fn.items(dict) end
 
@@ -5952,7 +5954,7 @@ function vim.fn.matchstrpos(expr, pat, start, count) end
 --- an error.  An empty |List| or |Dictionary| results in zero.
 ---
 --- @param expr any
---- @return any
+--- @return number
 function vim.fn.max(expr) end
 
 --- Returns a |List| of |Dictionaries| describing |menus| (defined
@@ -7016,10 +7018,11 @@ function vim.fn.readfile(fname, type, max) end
 ---   echo reduce('xyz', { acc, val -> acc .. ',' .. val })
 --- <
 ---
+--- @generic T
 --- @param object any
---- @param func function
+--- @param func fun(accumulator: T, current: any): any
 --- @param initial? any
---- @return any
+--- @return T
 function vim.fn.reduce(object, func, initial) end
 
 --- Returns the single letter name of the register being executed.
@@ -7215,8 +7218,9 @@ function vim.fn.resolve(filename) end
 ---   let revlist = reverse(copy(mylist))
 --- <
 ---
---- @param object any
---- @return any
+--- @generic T
+--- @param object T[]
+--- @return T[]
 function vim.fn.reverse(object) end
 
 --- Round off {expr} to the nearest integral value and return it
@@ -9079,10 +9083,11 @@ function vim.fn.sockconnect(mode, address, opts) end
 ---   eval mylist->sort({i1, i2 -> i1 - i2})
 --- <
 ---
---- @param list any
+--- @generic T
+--- @param list T[]
 --- @param how? string|function
 --- @param dict? any
---- @return any
+--- @return T[]
 function vim.fn.sort(list, how, dict) end
 
 --- Return the sound-folded equivalent of {word}.  Uses the first