Nightly build ("master" branch)

What's Changed

• Update zerokit-utils to version 0.7.0 in utils/README.md file by @sydhds in #348
• chore: use rust nightly-2025-09-24 until patch version release by @vinhtc27 in #351
• Set ruint dependency with fewer features by @sydhds in #349
• nix: bump nixpkgs and add binary cache by @jakubgs in #346
• Add initial code for ffi rework by @sydhds in #337
• fix(rln): resolve memory leak in calc_witness and improve FFI memory deallocation pattern by @vinhtc27 in #354
• feat(wasm): rework rln-wasm and rln-wasm-utils modules, remove buffer-based serialization, and update public.rs and protocol.rs accordingly by @vinhtc27 in #352
• feat: unify RLN types, refactor public APIs, add full (de)serialization, align FFI/WASM/APIs, simplify errors, update docs/examples, and clean up zerokit by @vinhtc27 in #355
• fix(ci): nightly build failed due to incorrect config flag for pm_tree_adapter by @vinhtc27 in #357

Full Changelog: v0.9.0...nightly