feat: capability for XML's normalizedString

[jkowalleck]

Feature request

Implement a capability (decorator) to mark class properties as normalizedString for XML.
Only when this marker is set:

• on serializing to XML: replace special characters by space ( )
• on deserializing to XML: replace special characters by space ( )

why both? Because the values should not have been in the XML in the first place!
so they must not appear after reading, and they must not appear after writing.

Background

XSD http://www.w3.org/2001/XMLSchema - which defines normalizedString as follows:

<xs:simpleType name="normalizedString" id="normalizedString">
  <xs:annotation>
    <xs:documentation source="http://www.w3.org/TR/xmlschema-2/#normalizedString"/>
  </xs:annotation>
  <xs:restriction base="xs:string">
    <xs:whiteSpace value="replace" id="normalizedString.whiteSpace"/>
  </xs:restriction>
</xs:simpleType>

normalizedString represents white space normalized strings. The ·value space· of normalizedString is the set of strings that do not contain the carriage return (#xD), line feed (#xA) nor tab (#x9) characters. The ·lexical space· of normalizedString is the set of strings that do not contain the carriage return (#xD), line feed (#xA) nor tab (#x9) characters. The ·base type· of normalizedString is string.

[jkowalleck]

similar to #115

[jkowalleck]

solution as done in TS?JS CycloneDX/cyclonedx-javascript-library#1116

[jkowalleck]

i started working on this, via #119