nitter addon added

Treansfering the addon from the separate repository into the projects addon collection.

This addon is meant to replace links to Twitter in the body of postings with a nitter [1] instance of the admins choice. It is not meant to change links to contact prociles.

In addition to the change, a note about the changed links is placed at the bottom of the posting.

1: https://github.com/zedeus/nitter

nitter/lang/C/messages.po

@@ -0,0 +1,41 @@
+# ADDON nitter
+# Copyright (C) 
+# This file is distributed under the same license as the Friendica nitter addon package.
+# 
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: \n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2021-03-08 07:44+0100\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#: nitter.php:51
+#, php-format
+msgid ""
+"Which nitter server shall be used for the replacements in the post bodies? "
+"Use the URL with servername and protocol.  See %s for a list of available "
+"public Nitter servers."
+msgstr ""
+
+#: nitter.php:52
+msgid "Nitter server"
+msgstr ""
+
+#: nitter.php:53
+msgid "Save Settings"
+msgstr ""
+
+#: nitter.php:65
+#, php-format
+msgid ""
+"Links to Twitter in this posting were replaced by links to the Nitter "
+"instance at %s"
+msgstr ""