feat: enhance alias management and add QA tooling

Author: Thavarshan

CHANGELOG.md

@@ -1,5 +1,25 @@
 # Release Notes
 
+## [Unreleased]
+
+### Added
+
+- **Alias management commands:** Added `phpvm alias` and `phpvm unalias` for version alias creation, listing, and removal.
+- **Alias resolution support:** Aliases now resolve in `phpvm install`, `phpvm use`, and `phpvm which`.
+- **Alias visibility:** `phpvm list` now shows configured aliases.
+- **Quality assurance tooling:** Added ShellCheck and shfmt configuration, a QA Makefile, and a `qa.sh` runner script.
+- **BATS test suite:** Added comprehensive BATS tests for core functionality and new alias behavior.
+- **CI quality workflow:** Added a quality workflow for linting, formatting, and tests.
+
+### Changed
+
+- **Help output:** Promoted alias commands to the primary usage section.
+
+### Internal
+
+- **Alias helper utilities:** Added alias listing helper and alias resolution logic.
+- **Test coverage:** Extended built-in test suite to cover alias functionality.
+
 ## [v1.7.0](https://github.com/Thavarshan/phpvm/compare/v1.6.0...v1.7.0) - 2025-12-10
 
 ### Added