Rule author

I am the original author. All these rules come from this repo:

https://github.com/pfultz2/cppcheck-rules

Except the rules are out of date. These rules have been updated to make them more robust. For example the `EmptyIfStatement` rule checks for nested parenthesis: `if (\([^()]*(?-1)*[^()]*\)) { }` but the one in the repo is much older and does not.

There are also additional rules available.

Start by comparing the rules in this repository with the original author's updated rules at https://github.com/pfultz2/cppcheck-rules, using EmptyIfStatement as the stated example. Done means bringing the existing rules up to date for cases such as nested parentheses and deciding which additional rules from the source repository belong here.

Written by the indexing model from the issue text.