Switch from bincode to postcard [skip ci] (#410)

Co-authored-by: UkoeHB <37489173+UkoeHB@users.noreply.github.com>

CHANGELOG.md

@@ -13,6 +13,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Update `ReplicatedClients` immediately to let users set visibility on `ClientConnected` trigger.
 
+### Changed
+
+- Replace `bincode` with `postcard`. It has more suitable variable integer encoding and potentially unlocks `no_std` support. If you use custom ser/de functions, replace `DefaultOptions::new().serialize_into(message, event)` with `postcard_utils::to_extend_mut(event, message)` and `DefaultOptions::new().deserialize_from(cursor)` with `postcard_utils::from_buf(message)`.
+- All serde methods now use `postcard::Result` instead of `bincode::Result`.
+- All deserialization methods now accept `Bytes` instead of `std::io::Cursor` because deserialization from `std::io::Read` requires a temporary buffer. `Bytes` already provide cursor-like functionality. The crate now re-exported under `bevy_replicon::bytes`.
+
 ## [0.30.0] - 2025-02-04
 
 ### Added

Cargo.toml

@@ -35,12 +35,11 @@ serde = "1.0"
 bevy = { workspace = true, features = ["serialize"] }
 thiserror = "2.0"
 typeid = "1.0"
-bytes = "1.5"
-bincode = "1.3"
+bytes = "1.10"
 serde.workspace = true
-integer-encoding = "4.0"
 ordered-multimap = "0.7"
-bitflags = "2.6"
+bitflags = { version = "2.6", features = ["serde"] }
+postcard = { version = "1.1", default-features = false }
 
 [dev-dependencies]
 bevy = { workspace = true, features = [