Bug 37121: MARC21 Addition to relator terms in technical notice 2024-05-14

This patch adds relator codes from the May 14, 2024 technical notice
(https://loc.gov/marc/relators/tn240514rel.html) to the list of MARC21 relator
terms in Koha.

To test:
1. Apply patch and reset_all
2. Go to Administration > Authorized values > RELTERMS
3. Search for the added relator codes

   - wfs - Writer of film story
   - wft - Writer of intertitles
   - wts - Writer of television story

Note: this is added in the installer files. It will not affect existing
installations. For existing installations, add the new relator codes in
Administration > Authorized values > RELTERMS.

Signed-off-by: Phil Ringnalda <phil@chetcolibrary.org>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>

installer/data/mysql/en/optional/marc21_relatorterms.yml

@@ -1190,6 +1190,14 @@ tables:
           authorised_value: "wde"
           lib: "Wood engraver"
 
+        - category: "RELTERMS"
+          authorised_value: "wfs"
+          lib: "Writer of film story"
+
+        - category: "RELTERMS"
+          authorised_value: "wft"
+          lib: "Writer of intertitles"
+
         - category: "RELTERMS"
           authorised_value: "win"
           lib: "Writer of introduction"
@@ -1205,3 +1213,7 @@ tables:
         - category: "RELTERMS"
           authorised_value: "wst"
           lib: "Writer of supplementary textual content"
+
+        - category: "RELTERMS"
+          authorised_value: "wts"
+          lib: "Writer of television story"