Cardano Updates

Every compiler after ghc-8.6, automaticallt derives this typeclass
for every data type. In ghc-9.14 derived Typeable instances result
in warnings.

* Remove un-needed imports.
* Fix deprecation warnings.
* Remove redundant constraints.

CI stylish and deloy docs FIX

The result symlink points to a directory. Check result/bin/ for
the cardano-addresses-wasm binary, or search for it if not found.

The nix build .#wasm creates result symlink pointing to a directory.
The WASM binary is located at result/bin/cardano-addresses-wasm.

The nix build .#wasm creates a symlink 'result' pointing directly to
the WASM binary. Use cp -L to dereference the symlink and copy
the actual binary file.

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Nixpkgs expects to drop support for intel macs in 26.11.

Replace the ad-hoc nix/ directory and flake-utils setup with a
flake-parts structure mirroring hermod-tracing:

- flake.nix: adopt nixConfig cache block, flake-parts, haskell.nix +
  hackageNix + CHaP; remove devx and flake-utils
- flake/lib.nix: recursiveImports helper for auto-discovering perSystem
- perSystem/project.nix: cabalProject' for cardano-addresses (ghc967)
- perSystem/devShells.nix: shellFor with cabal/ghcid/HLS tools
- perSystem/packages.nix: library, exe and unit test check
- perSystem/haddocks.nix: haddock index package (ghc967)
- perSystem/hydraJobs.nix: required/nonrequired aggregates; Darwin in
  nonrequired
- perSystem/wasm.nix: wasm32-wasi cross-build via projectCross.wasi32
  (ghc9123) with haskell.nix native toolchain; module overrides for ram
  and crypton hsc2hs/C flags
- perSystem/windows.nix: mingwW64 cross-build via projectCross.mingwW64
- perSystem/musl.nix: static x86_64 binary via projectCross.musl64
- cabal-wasm.project: add --sha256 pins for source-repository-packages
- Remove nix/wasm.nix and nix/supported-systems.nix
- Remove old CI workflows (haskell, nix, style, wasm); replace with
  unified pages workflow building Docusaurus + Haddocks
- docusaurus.config.js: update to cardano-addresses.cardano.intersectmbo.org

* Remove un-needed imports.
* Fix deprecation warnings.
* Remove redundant constraints.