feat: also allow the config file without dot, give an error message at search replace if search was not found in file

lua/chatgpt_nvim/tools/replace_in_file.lua

@@ -3,14 +3,35 @@ local robust_lsp = require("chatgpt_nvim.tools.lsp_robust_diagnostics")
 
 local M = {}
 
+-- Enhanced search_and_replace to track if a string was found. We use Lua’s gsub return value 
+-- (updatedString, replacementCount) to see if any replacements occurred.
 local function search_and_replace(original, replacements)
   local updated = original
+  local info_msgs = {}
+
   for _, r in ipairs(replacements) do
     local search_str = r.search or ""
     local replace_str = r.replace or ""
-    updated = updated:gsub(search_str, replace_str)
+
+    local replacement_count = 0
+    updated, replacement_count = updated:gsub(search_str, replace_str)
+
+    -- If the string was not found, append an info message
+    if replacement_count == 0 then
+      table.insert(info_msgs, string.format(
+        "[replace_in_file Info] The string '%s' was NOT found in the file and was not replaced.",
+        search_str
+      ))
+    else
+      table.insert(info_msgs, string.format(
+        "[replace_in_file Info] The string '%s' was replaced %d time(s).",
+        search_str,
+        replacement_count
+      ))
+    end
   end
-  return updated
+
+  return updated, table.concat(info_msgs, "\n")
 end
 
 M.run = function(tool_call, conf, prompt_user_tool_accept, is_subpath, read_file)
@@ -31,7 +52,8 @@ M.run = function(tool_call, conf, prompt_user_tool_accept, is_subpath, read_file
     return string.format("[replace_in_file for '%s'] FAILED. Could not read file.", path)
   end
 
-  local updated_data = search_and_replace(orig_data, replacements)
+  -- Now we get not only the updated data but also info messages about replacements
+  local updated_data, info_messages = search_and_replace(orig_data, replacements)
   handler.write_file(path, updated_data, conf)
 
   local msg = {}
@@ -40,6 +62,11 @@ M.run = function(tool_call, conf, prompt_user_tool_accept, is_subpath, read_file
   msg[#msg+1] = string.format("<final_file_content path=\"%s\">\n%s\n</final_file_content>", path, updated_data)
   msg[#msg+1] = "\nIMPORTANT: For any future changes to this file, use the final_file_content shown above as your reference.\n"
 
+  -- If there are any info messages (strings not found, etc.), include them
+  if info_messages and info_messages ~= "" then
+    msg[#msg+1] = "\nAdditional info about the replacement operation:\n" .. info_messages .. "\n"
+  end
+
   if conf.auto_lint then
     local diag_str = robust_lsp.lsp_check_file_content(path, updated_data, 3000)
     msg[#msg+1] = "\n" .. diag_str