Support more message kinds

[SuperAuguste]

• [x] initialized
• [x] initialize
• [x] shutdown
• [x] exit
• [ ] $/cancelRequest
• [x] textDocument/didOpen
• [x] textDocument/didChange
• [ ] textDocument/didSave
• [ ] textDocument/didClose
• [ ] textDocument/willSaveWaitUntil
• [x] textDocument/semanticTokens/full
• [x] textDocument/inlayHint
• [x] textDocument/completion
• [x] textDocument/signatureHelp
• [x] textDocument/definition
• [x] textDocument/typeDefinition
• [x] textDocument/implementation
• [x] textDocument/declaration
• [x] textDocument/hover
• [x] textDocument/documentSymbol
• [x] textDocument/formatting
• [x] textDocument/rename
• [x] textDocument/references
• [x] textDocument/documentHighlight
• [ ] textDocument/codeAction
• [ ] workspace/didChangeConfiguration
• [x] textDocument/foldingRange
• [ ] textDocument/selectionRange