Add Cargo.lock to the git repository

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

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

Author: Detegr

.gitignore

@@ -1,7 +1,6 @@
 **/*.rs.bk
 .#*
 .gdb_history
-Cargo.lock
 target/
 
 # editor files
@@ -10,4 +9,4 @@ target/
 !.vscode/*.svd
 !.vscode/launch.json
 !.vscode/tasks.json
-!.vscode/extensions.json
+!.vscode/extensions.json