Exclude rules from TODO creation

[elwayman02]

It would be great to be able to configure TODOs to ignore certain rules that we don't want to defer, such as prettier. This could be done by adding a new section to .lint-todorc, such as excludedRuleIds. This would cause the --update-todo flag to skip creation of TODOs for any rule ids configured there. I'm not sure it should have an impact on --clean-todo, as other config options like expiration dates don't invalidate TODOs that already exist.