chore: move pg_cron extension package to its own directory

Author: jfroche

nix/ext/pg_cron.nix nix/ext/pg_cron/default.nixnix/ext/pg_cron.nix renamed to nix/ext/pg_cron/default.nix

@@ -7,7 +7,7 @@
 
 let
   pname = "pg_cron";
-  allVersions = (builtins.fromJSON (builtins.readFile ./versions.json)).${pname};
+  allVersions = (builtins.fromJSON (builtins.readFile ../versions.json)).${pname};
   supportedVersions = lib.filterAttrs (
     _: value: builtins.elem (lib.versions.major postgresql.version) value.postgresql
   ) allVersions;

nix/ext/versions.json

@@ -29,7 +29,7 @@
       "rev": "v1.3.1",
       "hash": "sha256-rXotNOtQNmA55ErNxGoNSKZ0pP1uxEVlDGITFHuqGG4=",
       "patches": [
-        "pg_cron/pg_cron-1.3.1-pg15.patch"
+        "pg_cron-1.3.1-pg15.patch"
       ]
     },
     "1.4.2": {

nix/packages/postgres.nix

@@ -32,7 +32,7 @@
         ../ext/postgis.nix
         ../ext/pgrouting.nix
         ../ext/pgtap.nix
-        ../ext/pg_cron.nix
+        ../ext/pg_cron
         ../ext/pgsql-http.nix
         ../ext/pg_plan_filter.nix
         ../ext/pg_net.nix