[WIP] Support Lua5.5

[Copilot]

Support Lua 5.5 by updating LuaLatest mappings

Investigation shows that Lua 5.5 support is mostly implemented, but LuaLatest still points to Lua 5.4 instead of Lua 5.5.

Plan:

• Analyze current Lua 5.5 support implementation
• Update LuaLatest mapping in runtime.rs to point to Lua 5.5 version number
• Update LuaLatest mapping in config/mod.rs to point to Lua 5.5 language level
• Update _VERSION global to reflect Lua 5.5
• Run tests to verify changes work correctly
• Test Lua 5.5 global statement parsing manually

Key findings:

• LuaLanguageLevel::Lua55 and EmmyrcLuaVersion::Lua55 already exist
• Global statement parsing for Lua 5.5 is already implemented and tested
• Only need to update LuaLatest mappings to complete support

Fixes #562.

---

💬 Share your feedback on Copilot coding agent for the chance to win a $200 gift card! Click here to start the survey.