drop bincode

[tiye]

No description provided.

[Copilot]

Pull request overview

Removes the bincode dependency and related encode/decode usage, keeping serde support and updating examples accordingly.

Changes:

• Drop bincode from dependencies and remove Decode/Encode derives/imports.
• Update examples to validate serde Serialize/Deserialize trait availability instead of bincode roundtrips.
• Simplify a few pattern-matching blocks using Rust let-chains.

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/tree.rs	Refactors comma/dollar detection logic using let-chains (no behavior change intended).
src/primes.rs	Removes bincode derives/import; keeps serde impls; minor refactor in is_nested.
examples/test_features.rs	Replaces bincode serialization demo with compile-time serde trait bound checks.
examples/feature_test.rs	Same as above for the feature test example.
examples/bincode.rs	Removes the bincode example binary.
Cargo.toml	Bumps crate version and removes bincode dependency.
Cargo.lock	Removes bincode and updates resolved dependency graph accordingly.

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