v0.15.0

🚧 Breaking Changes

• Introduce global state (#1818)

✨ Enhancements

• Add Rake document symbols (#1444)
• Enable add-ons to extend completion (#1816)
• Add support for completionItem/resolve (#1798)

🐛 Bug Fixes

• Fix blank name for document symbol (#1614)
• Fix lazy document parsing and error reporting (#1805)
• Check if path exists before adding spec code lens (#1813)

📦 Other Changes

• Refactor into server and base server (#1648)
• Add logging note to troubleshooting docs (#1799)
• No-op Sorbet type assertions (#1801)
• Prevent RuboCop from rescuing Interrupt (#1808)
• Update warning block syntax (#1817)
• Add completion resolve demo (#1836)