feat(cli): add project management commands for init, apply, check, ed…

[mikeleppane]

…it, info, run, and require

feat(cli): implement rename command for environment variables with pattern matching

feat(cli): add replace command for updating environment variable values and find/replace functionality

feat(cli): introduce snapshot management commands for creating, listing, showing, restoring, deleting, and diffing snapshots

feat(cli): implement watch command for file synchronization with environment variables

fix(core): enhance EnvWatcher with change logging, pattern matching, and file handling capabilities

test(core): add comprehensive tests for EnvWatcher, including file watching, change logging, and synchronization scenarios

Description

Fixes # (issue)

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Performance improvement
• Code refactoring
• Test improvement
• CI/CD improvement
• Other (please describe):

How Has This Been Tested?

• Unit tests pass locally with cargo test
• Integration tests pass
• Manual testing completed
• Tested on Linux
• Tested on macOS
• Tested on Windows

Test Configuration:

• Rust version:
• OS:
• Terminal:

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have run cargo fmt to format my code
• I have run cargo clippy -- -D warnings and addressed all issues
• I have updated the CHANGELOG.md file (if applicable)

Screenshots / Terminal Output

Screenshots

Terminal Output

<!-- Add terminal output here -->

Performance Impact

• This change has no performance impact
• This change improves performance
• This change may degrade performance

Breaking Changes

• This change is backwards compatible
• This change requires migration steps

Additional Context

Related Issues / PRs

• Related to #
• Depends on #
• Blocks #

Reviewer Notes

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For Maintainers

• Changes are covered by tests
• Documentation has been updated
• CHANGELOG.md has been updated (if needed)
• Performance impact has been considered
• Security implications have been reviewed
• Cross-platform compatibility verified