docs: set self to clan-core for docs

modules/clan/eval-docs.nix

@@ -3,12 +3,16 @@
   lib,
   clanModule,
   clanLib,
+  clan-core,
 }:
 let
   eval = lib.evalModules {
     modules = [
       clanModule
     ];
+    specialArgs = {
+      self = clan-core;
+    };
   };
 
   evalDocs = pkgs.nixosOptionsDoc {

modules/clan/flake-module.nix

@@ -12,6 +12,7 @@ in
     }:
     let
       jsonDocs = import ./eval-docs.nix {
+        clan-core = self;
         inherit
           pkgs
           lib

pkgs/docs-from-code/flake-module.nix

@@ -64,6 +64,9 @@
           '';
     in
     {
+      legacyPackages = {
+        inherit jsonDocs clanModulesViaService;
+      };
       packages = {
         inherit module-docs;
       };