Bump version to v1.15.0

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: generall

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "bfb"
-version = "1.14.0"
+version = "1.15.0"
 edition = "2024"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html