VS Code version 1.86 support new API to correctly implement the Snippet suppport. Here is what needs to be done:

• update grade to VS Code version 1.86 by adjusting the client\package.json. Things that need to be update are the engine property and the corresponding devDependencies/@types/vscode
• in the client folder run npm run updateVSCodeVersion

Change the code in the protocol converter here as follows:

• instead of calling the replace on the result, construct VS Code text edits yourself, correctly converting LSP SnippetTextEdit into VS Code SnippetTextEdit.
• if the edit as an annotation convert it as well
• mained the converted edits in an array [TextEdit | SnippetTextEdit, WorkspaceEditEntryMetadata | undefined][]

When all edits are converted call result.set with this signature: https://github.com/microsoft/vscode/blob/56ed836ea9bae1602cf83bc286c7480b1370a99f/src/vscode-dts/vscode.d.ts#L3975