GH-5327 Version Announcement

[SarahGrand]

GH-5327

Implementation of RDF 1.2 version announcement.
Parsing version implemented only in Turtle, TriG, NTriples, and NQuads parsers.
Writing version implemented only for Turtle and TriG writers, since NTriples and NQuads specs leave version announcement an open question, as directives are not natively part of the syntax and may break other parsers.

Note: this PR also includes the changes for RDF 1.2 Literals and Triple Terms since the version announcement relies on this code. RDF 1.2 Literals and Triple Terms changes should be merged before this.

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PR Author Checklist (see the contributor guidelines for more details):

• my pull request is self-contained
• I've added tests for the changes I made
• I've applied code formatting (you can use mvn process-resources to format from the command line)
• I've squashed my commits where necessary
• every commit message starts with the issue number (GH-xxxx) followed by a meaningful description of the change