Remove lockfiles from git history

Signed-off-by: Michael X. Grey <[email protected]>

Author: mxgrey

.gitignore

@@ -14,4 +14,8 @@ target/
 #  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
-#.idea/
+#.idea/
+
+# Do not commit cargo lockfiles since they create git history churn and are not
+# necessarily compatible across different Rust versions.
+Cargo.lock