Show error and disable deployment when environment and secrets have duplicates

[dotNomad]

This PR adds a new error that disables deployment - similar to a missing credential error in style - when there are names shared in Environment and Secrets in the selected Configuration.

Preview

 

The duplicated names are present in the error to make it easier to resolve, along with a link to edit the configuration similar to other errors.

Intent

Resolves #2326

Type of Change

• • [x] Bug Fix
• • [ ] New Feature
• • [ ] Breaking Change
• • [ ] Documentation
• • [ ] Refactor
• • [ ] Tooling

[sagerb]

@dotNomad The work you've done here definitely overlaps/conflicts with the work in https://github.com/posit-dev/publisher/pull/2331. We should discuss how we'll move forward and resolve this.

Issue has been resolved!

[dotNomad]

We should discuss how we'll move forward and resolve this.

We could merge this prior since it is a relatively simpler change, and componentize it with the other work.

[kgartland-rstudio]

Verified the proper warning is shown if a Secret/Env Var collision occurs within the config. Deployment button remains active and deploys properly even if you forgo the warning.

Verified an error message is thrown when adding a Secret where an already-existing Environment Variable.

Tested on:

• [x] Positron on MacOS + Windows + Linux
• [x] VSCode MacOS + Windows + Linux