TRG New: Rework OpenAPI spec hosting

[Siegfriedk]

We still use the OpenAPI Plugin on eclipse website which is behind Docusaurus development. Due to this plugin being the only real problem, we wanted to migrate to Swagger Hub. We discovered that this is not possible and have to rethink our solution.

We therefore create our own Swagger Hub / OpenAPI hosting through a similar workflow as the helm chart repository does: We scan the repositories for openAPI Specs and render out a static github page.

AC:

• Create new TRG and open it up for disucssions
• Create a build script which pulls in OpenAPI specs
  • Script should either scan a github page OR preferable released artifacts to only pull in official versions
• Make it configurable through the .tractusx file if necessary
• Make sure to cache, if nothing is new, we shouldn't generate anything new and should be quick

Hint:

• /api/< product >/< version >/Swagger UI
• https://github.com/eclipse-tractusx/charts
• https://github.com/eclipse-edc/.github/blob/main/.github/workflows/publish-openapi-ui.yml