refactor: strip Aeson from Types, remove Server.hs, fix Sis.hs exports, update deps

- Removed all Aeson instances from Types.hs
- Deleted Server.hs (Orb/WAI routing)
- Added Hyperbole form types (LoginForm, SignupForm, etc.)
- Removed Server from Sis.hs and cabal file
- Updated stack.yaml for Hyperbole dependency resolution
- Added local hyperbole copy with GHC 9.10 compat patches
- Types.hs, Database.hs, Auth.hs compile successfully

sis-server.cabal

@@ -19,7 +19,6 @@ library
       Sis
       Sis.Auth
       Sis.Database
-      Sis.Server
       Sis.Types
   other-modules:
       Paths_sis_server