Add support for per-environment settings

[DannyBen]

As discussed in #665 and raised in #664.

This adds the ability to add _production or _development suffix to all option names in the settings.

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• Implementation
• Specs
• Documentation - Source / Preview

[Copilot]

Pull Request Overview

This PR adds support for per-environment settings in Bashly, allowing users to specify environment-specific configuration values by appending _production or _development suffixes to option names in the settings file.

• Refactored the settings retrieval logic to support environment-specific configuration overrides
• Added comprehensive test coverage for the new environment suffix functionality
• Updated documentation in the settings file to explain the new feature

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
lib/bashly/settings.rb	Refactored settings retrieval logic to support environment-specific overrides with _production/_development suffixes
spec/bashly/settings_spec.rb	Added test cases to verify environment suffix override behavior
lib/bashly/libraries/settings/settings.yml	Enhanced documentation with detailed explanation of environment overrides feature
.rubocop.yml	Added exception for longer test examples in command spec file

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