feat: Add OpenAPI 3.1 specification for language-agnostic API access (#1328)

* Added-open-api-spec-file

* Added-open-api-spec-file-2

* Added-open-api-spec-file-v3

* Added-fixes-in-open-api-spec-file

* Multiple-fixes-as-per-pilot

* Added-uploadenv

---------

Co-authored-by: Mario Behling <mb@mariobehling.de>

Author: Manik-Khajuria-5