4.7.0: Sort command signatures

• 🔧 Change: Update LanguageTool to 4.7 (see LT 4.7 release notes)
• ✨ New: Support multi-root workspaces, all configuration settings except ltex.enabled are now resource-specific — vscode-ltex#7
• 🔧 Change: Save dictionary settings under full language short code (e.g., en-US instead of en). If you already have a dictionary under ltex.en.dictionary and use en-US as language (not en), you have to rename the settings name to ltex.en-US.dictionary (similarly for other languages).
• 🗑 Removal: Remove diagnostics when a file is closed
• 🐛 Bug fix: Prevent insertion of text in TikZ mode
• ✨ New: Add support for more commands such as \newenvironment, \newgeometry, and \pagenumbering