Add ISFDB (Internet Speculative Fiction Database) identifiers support (internetarchive#11146)

* Add ISFDB identifiers for authors, works, and fix HTTPS for editions

Author: Copilot

openlibrary/plugins/openlibrary/config/author/identifiers.yml

@@ -27,6 +27,11 @@ identifiers:
     notes: Should be something like nm0393654
     url: https://www.imdb.com/name/@@@
     website: https://www.imdb.com/
+-   label: Internet Speculative Fiction Database
+    name: isfdb
+    notes: Should be a number
+    url: https://www.isfdb.org/cgi-bin/ea.cgi?@@@
+    website: https://www.isfdb.org
 -   label: Inventaire
     name: inventaire
     notes: two formats depending on if the author exists in wikidata, wd:Q42 or inv:914ad8068b8711ead0cc2efbed56e53c

openlibrary/plugins/openlibrary/config/edition/identifiers.yml

@@ -171,8 +171,8 @@ identifiers:
     url: https://archive.org/details/@@@
 -   label: Internet Speculative Fiction Database
     name: isfdb
-    url: http://www.isfdb.org/cgi-bin/pl.cgi?@@@
-    website: http://www.isfdb.org
+    url: https://www.isfdb.org/cgi-bin/pl.cgi?@@@
+    website: https://www.isfdb.org
 -   label: English Title Short Catalogue Citation Number
     name: etsc
     url: http://estc.bl.uk/@@@

openlibrary/plugins/openlibrary/config/work/identifiers.yml

@@ -11,6 +11,11 @@ identifiers:
 -   label: Goodreads
     name: goodreads
     url: https://www.goodreads.com/work/editions/@@@
+-   label: Internet Speculative Fiction Database
+    name: isfdb
+    notes: Should be a number
+    url: https://www.isfdb.org/cgi-bin/title.cgi?@@@
+    website: https://www.isfdb.org
 -   label: LibraryThing
     name: librarything
     url: https://www.librarything.com/work/@@@