ci: add neutron chain env files

[kerber0x]

Description and Motivation

This adds neutron env config files.

Related Issues

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Checklist:

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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

Additional details and impacted files

@@           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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[0xFable]

LGTM