Create zeitschrift-fur-theologie-und-kirche.csl

 * The style does not need any bibliography, but for completeness (preview) it shows here the appearance of the footnotes.
 * AFAIK special abbreviations on names Ch. for Christoph, Ph. for Philipp, Th. for Theodor cannot implemented.
 * The "Ders./Dies." aka <a href="https://www.zotero.org/support/kb/idem">idem</a> things have to be added manually.

It seems to be important that the test for ibid-with-locator is before the test for ibid (at least in my very small tests).