Move wtf8 -> crates/wtf8 (#6257)

Cargo.toml

@@ -132,7 +132,6 @@ members = [
     "vm/sre_engine",
     "stdlib",
     "derive-impl",
-    "wtf8",
     "wasm/lib",
     "crates/*",
 ]
@@ -158,7 +157,7 @@ rustpython-vm = { path = "vm", default-features = false, version = "0.4.0" }
 rustpython-pylib = { path = "crates/pylib", version = "0.4.0" }
 rustpython-stdlib = { path = "stdlib", default-features = false, version = "0.4.0" }
 rustpython-sre_engine = { path = "vm/sre_engine", version = "0.4.0" }
-rustpython-wtf8 = { path = "wtf8", version = "0.4.0" }
+rustpython-wtf8 = { path = "crates/wtf8", version = "0.4.0" }
 rustpython-doc = { path = "crates/doc", version = "0.4.0" }
 
 ruff_python_parser = { git = "https://github.com/astral-sh/ruff.git", tag = "0.14.1" }