Add C# JWT rules: enforce token verification and no hardcoded secrets (#195)

* removed missing-secure-java * httponly-false-csharp * use-of-md5-digest-utils-java * removing use-of-md5-digest-utils and httponly-false-csharp * jwt-hardcoded-secret-csharp * jwt-decode-without-verify-csharp --------- Co-authored-by: Sakshis <sakshil@abc.com>

Author: ESS-ENN