docs(comment): add doc

doc/gopher.nvim.txt

@@ -15,6 +15,7 @@ Table of Contents
   Auto implementation of interface methods..................|gopher.nvim-impl|
   Generating unit tests boilerplate......................|gopher.nvim-gotests|
   Iferr....................................................|gopher.nvim-iferr|
+  Generate comments.....................................|gopher.nvim-comments|
   Setup `nvim-dap` for Go......................................|gopher.nvim-dap|
 
 ------------------------------------------------------------------------------
@@ -200,6 +201,14 @@ Usage ~
 execute `:GoIfErr` near any err variable to insert the check
 
 
+==============================================================================
+------------------------------------------------------------------------------
+                                                          *gopher.nvim-comments*
+Usage ~
+Execute `:GoCmt` to generate a comment for the current function/method/struct/etc on this line.
+This module provides a way to generate comments for Go code.
+
+
 ==============================================================================
 ------------------------------------------------------------------------------
                                                                *gopher.nvim-dap*

lua/gopher/comment.lua

@@ -1,3 +1,8 @@
+---@toc_entry Generate comments
+---@tag gopher.nvim-comments
+---@usage Execute `:GoCmt` to generate a comment for the current function/method/struct/etc on this line.
+---@text This module provides a way to generate comments for Go code.
+
 local function generate(row, col)
   local ts_utils = require "gopher._utils.ts"
   local comment, ns = nil, nil

scripts/docgen.lua

@@ -14,6 +14,7 @@ local files = {
   "lua/gopher/impl.lua",
   "lua/gopher/gotests.lua",
   "lua/gopher/iferr.lua",
+  "lua/gopher/comment.lua",
   "lua/gopher/dap.lua",
 }