blink: do not deprio snippets by default

modules/plugins/completion/blink-cmp/blink-cmp.nix

@@ -1,6 +1,7 @@
 {lib, ...}: let
   inherit (lib.options) mkEnableOption mkOption literalMD;
   inherit (lib.types) listOf str either attrsOf submodule enum anything int nullOr;
+  inherit (lib.generators) mkLuaInline;
   inherit (lib.nvim.types) mkPluginSetupOption luaInline;
   inherit (lib.nvim.binds) mkMappingOption;
   inherit (lib.nvim.config) mkBool;
@@ -47,6 +48,19 @@ in {
           default = {};
           description = "Providers";
         };
+
+        transform_items = mkOption {
+          type = nullOr luaInline;
+          default = mkLuaInline "function(_, items) return items end";
+          defaultText = ''
+            Our default does nothing. If you want blink.cmp's default, which
+            lowers the score for snippets, set this option to null.
+          '';
+          description = ''
+            Function to use when transforming the items before they're returned
+            for all providers.
+          '';
+        };
       };
 
       completion = {