ci: add neutron chain env files

[kerber0x]

Description and Motivation

This adds neutron env config files.

Related Issues

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Checklist:

• [x] I have read Migaloo's contribution guidelines.
• [x] My pull request has a sound title and description (not something vague like Update index.md)
• [x] All existing and new tests are passing.
• [x] I updated/added relevant documentation.
• [x] The code is formatted properly cargo fmt --all --.
• [x] Clippy doesn't report any issues cargo clippy -- -D warnings.
• [x] I have regenerated the schemas if needed cargo schema.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 93.21%. Comparing base (0653e25) to head (0dac244).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #365 +/- ## ======================================= Coverage 93.21% 93.21% ======================================= Files 219 219 Lines 24868 24868 ======================================= Hits 23180 23180 Misses 1688 1688 ```

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