Allow Regex in FieldPolicies

[CodeShellDev]

Description

Add regex support to fieldPolicies

Solution

Add a way for users to instead use regex for matching blocked / allowed values of policies.

[CodeShellDev]

Same questions as in #70

[CodeShellDev]

Same as in #70, this would only apply to string values.

Here‘s how this would be done:
Always first try to compile as regex, if it fails use glob-style patterns.