Split bson implementation across multiple files

Author: simolus3

Cargo.lock

@@ -22,8 +22,6 @@ serde = { version = "1.0", default-features = false, features = ["alloc", "deriv
 streaming-iterator = { version = "0.1.9", default-features = false, features = ["alloc"] }
 lock_api = { version = "0.4.12", default-features = false }
 futures-lite = { version = "2.6.0", default-features = false }
-# Only used to test our BSON implementation, depends on std
-bson = { version = "2.14.0", optional = true }
 
 [dependencies.uuid]
 version = "1.4.1"
@@ -37,7 +35,6 @@ features = []
 [features]
 default = ["getrandom"]
 
-std = ["dep:bson"]
 loadable_extension = ["sqlite_nostd/loadable_extension"]
 static = ["sqlite_nostd/static"]
 omit_load_extension = ["sqlite_nostd/omit_load_extension"]