lsp websocket messages

```json
{"jsonrpc":"2.0","id":0,
"method":"initialize",
"params":{"capabilities":{"textDocument":{"hover":{"dynamicRegistration":true,"contentFormat":["markdown","plaintext"]},"synchronization":{"dynamicRegistration":true,"willSave":false,"didSave":false,"willSaveWaitUntil":false},"formatting":{"dynamicRegistration":true},"completion":{"dynamicRegistration":true,"completionItem":{"snippetSupport":true,"commitCharactersSupport":false,"documentationFormat":["markdown","plaintext"],"deprecatedSupport":false,"preselectSupport":false},"contextSupport":false},"signatureHelp":{"signatureInformation":{"documentationFormat":["markdown","plaintext"],"activeParameterSupport":true}},"documentHighlight":{"dynamicRegistration":true},"semanticTokens":{"multilineTokenSupport":false,"overlappingTokenSupport":false,"tokenTypes":[],"tokenModifiers":[],"formats":["relative"],"requests":{"full":{"delta":false},"range":true},"augmentsSyntaxTokens":true}},"workspace":{"didChangeConfiguration":{"dynamicRegistration":true}}},"processId":null,"rootUri":"","workspaceFolders":null}
}
```
<=
{"jsonrpc":"2.0","id":0,
"result":{"capabilities":{"textDocumentSync":2,"completionProvider":{"resolveProvider":false,"triggerCharacters":["\"",":"]},"hoverProvider":true,"documentSymbolProvider":true,"documentRangeFormattingProvider":false,"colorProvider":{},"foldingRangeProvider":true,"selectionRangeProvider":true,"documentLinkProvider":{}}}
}

{"jsonrpc":"2.0","method":"initialized","params":{}}

{"jsonrpc":"2.0","method":"workspace/didChangeConfiguration","params":{"settings":{}}}


<=
{"jsonrpc":"2.0",
"method":"textDocument/publishDiagnostics",
"params":{"uri":"session1.json","diagnostics":[]}
}
<=
{"jsonrpc":"2.0","method":"textDocument/publishDiagnostics","params":{"uri":"session1.json","diagnostics":[{"range":{"start":{"line":2,"character":7},"end":{"line":2,"character":16}},"message":"Expected comma","severity":1,"code":514,"source":"json"}]}}