New name and moved to 'extract' command

What's new since 0.4.0

• Added PHP test matrix to CI and replaced PHP runner for release. @AlexSkrypnyk (#39)
• ❗ BC: Refactored to use extract command. @AlexSkrypnyk (#38)
• Updated references to shellvar. @AlexSkrypnyk (#36)
• ❗ BC: [#34] Rename project to shellvar @tannguyen04 (#35)
• [#26] Update tests to use CommandTestCase and update coverage @tannguyen04 (#32)
• Update dependency alexskrypnyk/csvtable to ^0.2.0 @tannguyen04 (#31)
• Update dependency symfony/console to v7 @renovate (#27)
• [#28] Update repo configs from https://getscaffold.dev/ @tannguyen04 (#30)
• Updated repo structure to follow scaffold. @AlexSkrypnyk (#23)
• Updated codebase to be inline with the scaffold repo and fixed coding standards. @lankmiler (#19)

Full Changelog: 0.4.0...0.5.0

@AlexSkrypnyk, @lankmiler, @renovate, @renovate[bot] and @tannguyen04