Add Cargo.lock files to the repository

It is recommended[1] for binary crates to include Cargo.lock files in
their respective git repositories.

Top level Cargo.lock is left out as the top level workspace only
contains library crates.

[1]: https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html

Author: Detegr

.gitignore

@@ -1,4 +1,3 @@
 */target
 target/
-*Cargo.lock*
-*/Cargo.lock
+/Cargo.lock