chore(provider): use latest cohere models (#400)

Update prompts to correct grammar
concat with table.concat to avoid overhead

Signed-off-by: Aaron Pham <contact@aarnphm.xyz>

lua/avante/config.lua

@@ -62,10 +62,10 @@ M.defaults = {
   ---@type AvanteSupportedProvider
   cohere = {
     endpoint = "https://api.cohere.com/v1",
-    model = "command-r-plus",
+    model = "command-r-plus-08-2024",
     timeout = 30000, -- Timeout in milliseconds
     temperature = 0,
-    max_tokens = 3072,
+    max_tokens = 4096,
     ["local"] = false,
   },
   ---To add support for custom provider, follow the format below
@@ -233,7 +233,7 @@ M = setmetatable(M, {
 
 M.support_paste_image = function()
   local supported = Utils.has("img-clip.nvim") or Utils.has("img-clip")
-  if not supported and not M.options.silent_warning then
+  if not supported then
     Utils.warn("img-clip.nvim is not installed. Pasting image will be disabled.", { once = true })
   end
   return supported

lua/avante/llm.lua

@@ -51,8 +51,8 @@ Replace lines: {{start_line}}-{{end_line}}
    - The content regarding line numbers MUST strictly follow the format "Replace lines: {{start_line}}-{{end_line}}". Do not be lazy!
    - The range {{start_line}}-{{end_line}} is INCLUSIVE. Both start_line and end_line are included in the replacement.
    - Count EVERY line, including empty lines and comments lines, comments. Do not be lazy!
-   - For single-line changes, use the same number for start and end lines.
-   - For multi-line changes, ensure the range covers ALL affected lines, from the very first to the very last.
+   - Use the same number for start and end lines for single-line changes.
+   - For multi-line changes, ensure the range covers ALL affected lines, from first to last.
    - Double-check that your line numbers align perfectly with the original code structure.
 
 5. Final check:
@@ -63,7 +63,7 @@ Replace lines: {{start_line}}-{{end_line}}
    - Double-check that your line numbers align perfectly with the original code structure.
    - DO NOT return the complete modified code with applied changes!
 
-Remember: Accurate line numbers are CRITICAL. The range start_line to end_line must include ALL lines to be replaced, from the very first to the very last. Double-check every range before finalizing your response, paying special attention to the start_line to ensure it hasn't shifted down. Ensure that your line numbers perfectly match the original code structure without any overall shift.
+Remember: Accurate line numbers are CRITICAL. The range start_line to end_line must include ALL lines to be replaced, from the very first to the very last. Double-check every range before finalizing your response, paying special attention to the start_line to ensure it hasn't shifted down. Ensure your line numbers match the original code structure without any overall shift.
 ]]
 
 local editing_mode_user_prompt_tpl = [[

lua/avante/providers/cohere.lua

@@ -31,10 +31,7 @@ local M = {}
 M.api_key_name = "CO_API_KEY"
 
 M.parse_message = function(opts)
-  local user_prompt = ""
-  for _, user_prompt_ in ipairs(opts.user_prompts) do
-    user_prompt = user_prompt .. "\n\n" .. user_prompt_
-  end
+  local user_prompt = table.concat(opts.user_prompts, "\n\n")
 
   return {
     preamble = opts.system_prompt,
@@ -75,7 +72,7 @@ M.parse_curl_args = function(provider, code_opts)
       .. "."
       .. vim.version().patch,
   }
-  if not P.env.is_local("openai") then
+  if not P.env.is_local("cohere") then
     headers["Authorization"] = "Bearer " .. provider.parse_api_key()
   end
 

lua/avante/providers/openai.lua

@@ -28,10 +28,7 @@ local M = {}
 M.api_key_name = "OPENAI_API_KEY"
 
 M.parse_message = function(opts)
-  local user_prompt = ""
-  for _, user_prompt_ in ipairs(opts.user_prompts) do
-    user_prompt = user_prompt .. "\n\n" .. user_prompt_
-  end
+  local user_prompt = table.concat(opts.user_prompts, "\n\n")
 
   ---@type string | OpenAIMessage[]
   local user_content