Update .gitignore

Author: michal92299

.gitignore

@@ -1,7 +1,21 @@
-*.yaml linguist-detectable=true
-*.yaml linguist-documentation=false
-*.yaml linguist-language=YAML
+# Generated by Cargo
+# will have compiled files and executables
+debug
+target
 
-*.cr linguist-detectable=true
-*.cr linguist-documentation=false
-*.cr linguist-language=Crystal
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+# Generated by cargo mutants
+# Contains mutation testing data
+**/mutants.out*/
+
+# RustRover
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  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/