feat: allow overriding img_paste options (#1827)

lua/avante/clipboard.lua

@@ -42,7 +42,7 @@ function M.paste_image(line)
     dir_path = paste_directory:absolute(),
     prompt_for_file_name = false,
     filetypes = {
-      AvanteInput = { url_encode_path = true, template = "\nimage: $FILE_PATH\n" },
+      AvanteInput = Config.img_paste,
     },
   }
 

lua/avante/config.lua

@@ -371,6 +371,10 @@ M._defaults = {
       incoming = nil,
     },
   },
+  img_paste = {
+    url_encode_path = true,
+    template = "\nimage: $FILE_PATH\n",
+  },
   mappings = {
     ---@class AvanteConflictMappings
     diff = {