Add environment pipelines

[schroedermarius]

Related to #1

Add a pipeline to consume secrets from different environments and output the chosen environment via markdown.

• README.md

  • Add a section describing the new pipeline and how it consumes secrets from different environments.
  • Include an example of the pipeline configuration.

• .github/workflows/environment-pipeline.yml

  • Define a new GitHub Actions workflow for the pipeline.
  • Include steps to set up the environment and consume secrets.
  • Add a step to output the chosen environment via markdown.
  • Add a condition to run the pipeline on pull requests to main, develop, and test branches.
  • Add a separate action to echo out the environment variable.

• .github/actions/environment-action/action.yml

  • Define a new GitHub Actions action configuration file.
  • Include steps to set up the environment and consume secrets.
  • Add a step to output the chosen environment via markdown.

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