treewide: update to bincode 2

Consistently use bincode's Encode/Decode to avoid issues with
incompatible serde features. Support for storing some temporary files as
JSON is removed.

The size of the "processed" directory is reduced by ~8% with the new
default encoding of bincode 2. Performance is more or less unaffected.

src/world/block_entity.rs

@@ -1,7 +1,8 @@
 //! Processing of block entity data
 
+use bincode::{Decode, Encode};
 use minedmap_resource::{BlockFlag, BlockType};
-use serde::{Deserialize, Serialize};
+use serde::Serialize;
 
 use super::{
 	de,
@@ -9,7 +10,7 @@ use super::{
 };
 
 /// Kind of sign block
-#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Encode, Decode, Serialize)]
 #[serde(rename_all = "snake_case")]
 pub enum SignKind {
 	/// Standing sign
@@ -23,7 +24,7 @@ pub enum SignKind {
 }
 
 /// Processed sign data
-#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Encode, Decode, Serialize)]
 pub struct Sign {
 	/// The kind of the sign
 	pub kind: SignKind,
@@ -54,7 +55,7 @@ impl Sign {
 }
 
 /// Data for different kinds of [BlockEntity]
-#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Encode, Decode, Serialize)]
 #[serde(tag = "type", rename_all = "snake_case")]
 pub enum BlockEntityData {
 	/// A sign block
@@ -62,7 +63,7 @@ pub enum BlockEntityData {
 }
 
 /// A processed block entity
-#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Encode, Decode, Serialize)]
 pub struct BlockEntity {
 	/// Global X coordinate
 	pub x: i32,