Make 2.0_alpha release

[StroemPhi]

This PR makes a new release for nmrCV to reflect the current changes made by NFDI4Chem.

Changes summary:

• ATTENTION: This might introduce breaking changes with regard to using nmrCV in conjunction with nmrML!
  We therefore advise to keep using nmrCV version 1.1.0 with nmrML!
• The maintenance & development of nmrCV was migrated to an Ontology Development Kit based workflow, see also: Seeding empty nmrCV ODK repo #1, Moving all classes from v1.1 to the edit file in this repo #8, Update to ODK 1.5 #14 & Update to ODK 1.5.2 #30. Due to that nmrCV:
  • is now also published in the form of full and base release artefacts in .obo, .ttl as well as .owl serialization.
  • now imports terms from exisiting ontologies, such as CHEBI, BFO, RO, OBI & IAO, instead of redefining them anew,
    • most importantly it imports chemical entites from CHEBI as was initially planned and its nmrCV placeholder terms where thus properly deprecated, see also Add CHEBI terms that need to be imported #13, Import chebi dependencies #18, Deprecate NMR:1000881 (chemical compound) and its children #26, Add relevant isotopes to import from CHEBI #29. Clean up chemical entity #20 #53, Deprecate nmrCV compounds in favour of CHEBI #54 & Assign reference compounds #48 #55,
  • is now using a date based versioning scheme instead of a semantic versioning scheme, starting with the 2025-03-19 release, which can be interpreted as a 2.0_alpha version.
• In the present PR the ontology annotations where updated to include the new NFDI4Chem contributors and to reflect the reviving of nmrCV and its new scope.
  • Annotations specific to the contributors of the previous version where adjusted, in that contributors are now consistently listed individually using dc:contributor where no ORCID could be identified and dcterms.contributor where corresponding ORCIDs could be identified.
• The textual definition of NMR sample was made more general in NMR sample defintion #2.
• The NMR manufacturer pattern was harmonized with OBI in Rework NMR instruments and manufacutrers #40
• The calibration compound branch was improved in 4 restructure calibration compound #45.
• The class characterized compound was added in 9-new-term-charecterized-compound #37

A complete list of changes was created with robot diff:

• diff_nmrCV1.1-nmrCV2.0alpha.md
• diff_nmrCV1.1-nmrCV2.0alpha.html