doc: add kudos.txt for listing contributors

kudos.txt

+# kudos.txt - Express gratitude to your contributors.
+# https://github.com/kudos-txt
+
+project:
+  - name: ansible_role_name
+    site: https://git.slub-dresden.de/path/to/repo
+#    blog: <blog url>
+#    help: <support url>
+#    news: <news url>, <news feed url>
+#    mail: <mail@domain.tld>
+#    chat: <service:nick>, <service:channel>, <url>
+#    note: <free text notes>
+
+contributor:
+#  - name: <name or nick of the contributor>
+#    role: <role in the project>
+#    site: <website url>
+#    blog: <blog url>
+#    mail: <mail@domain.tld>
+#    chat: <service:nick>, <service:channel>, <url>
+#    home: <country>, <region>, <zip>, <city>, <address>
+#    work: <company>, <job title>, <job description>
+#    note: <free text notes>
+  - name: Jörg Sachse
+    role: Maintainer
+    mail: Joerg.Sachse@slub-dresden.de
+    home: Germany, Saxony, 01059, Dresden, Zellescher Weg 18
+    work: SLUB Dresden, Digital Preservationist &IT Administrator & Installation Wizard
+
+#partner:
+#  - name: <name of the partner>
+#    site: <website url>
+#    blog: <blog url>
+#    help: <support url>
+#    news: <news url>, <news feed url>
+#    mail: <mail@domain.tld>
+#    chat: <service:nick>, <service:channel>, <url>
+#    note: <free text notes>
+
+#software:
+#  - name: <name of the software>
+#    site: <website url>
+#    blog: <blog url>
+#    help: <support url>
+#    news: <news url>, <news feed url>
+#    mail: <mail@domain.tld>
+#    chat: <service:nick>, <service:channel>, <url>
+#    note: <free text notes>