Give importer deprecation warning.

resources/lang/en_US/import.php

@@ -36,6 +36,9 @@ return [
     // index page:
     'general_index_intro'                 => 'Welcome to Firefly III\'s import routine. There are a few ways of importing data into Firefly III, displayed here as buttons.',
 
+    // notices about the CSV importer:
+    'deprecate_csv_import' => 'As outlined in <a href="https://www.patreon.com/posts/future-updates-30012174">this Patreon post</a>, the way Firefly III manages importing data is going to change. That means that the CSV importer will be moved to a new, separate tool. You can already beta-test this tool if you visit <a href="https://github.com/firefly-iii/csv-importer">this GitHub repository</a>. I would appreciate it if you would test the new importer and let me know what you think.',
+
     // import provider strings (index):
     'button_fake'                         => 'Fake an import',
     'button_file'                         => 'Import a file',

resources/views/v1/import/file/configure-upload.twig

@@ -16,6 +16,9 @@
                     <p>
                         {{ trans('import.job_config_uc_text') }}
                     </p>
+                    <p class="text-danger">
+                        {{ trans('import.deprecate_csv_import')|raw }}
+                    </p>
                 </div>
             </div>
 

resources/views/v1/import/file/map.twig

@@ -22,6 +22,9 @@
                             {{ trans('import.job_config_map_nothing') }}
                         </p>
                     {% endif %}
+                    <p class="text-danger">
+                        {{ trans('import.deprecate_csv_import')|raw }}
+                    </p>
                 </div>
             </div>
 

resources/views/v1/import/file/new.twig

@@ -14,6 +14,9 @@
                     <p>
                         {{ trans('import.job_config_file_upload_text') }}
                     </p>
+                    <p class="text-danger">
+                        {{ trans('import.deprecate_csv_import')|raw }}
+                    </p>
                 </div>
             </div>
 

resources/views/v1/import/file/roles.twig

@@ -16,6 +16,9 @@
                     <p>
                         {{ trans('import.job_config_roles_text') }}
                     </p>
+                    <p class="text-danger">
+                        {{ trans('import.deprecate_csv_import')|raw }}
+                    </p>
                 </div>
             </div>
 

resources/views/v1/import/index.twig

@@ -14,6 +14,9 @@
                     <p>
                         {{ trans('import.general_index_intro') }}
                     </p>
+                    <p class="text-danger">
+                        {{ trans('import.deprecate_csv_import')|raw }}
+                    </p>
                     <div class="row">
                         {% for name, provider in providers %}
                             {# button for each import thing: #}