shota kizawa

add the normalize option to the diff API.

First, the token must have location information. The following structure is recommended. ``` /// For example, `from` equals /// ``` /// Token { /// body: "from", /// location_l { ///...

The following will be helpful. - https://github.com/microsoft/vscode-extension-samples/tree/main/lsp-sample - https://github.com/rust-analyzer/lsp-server/tree/master/examples - https://code.visualstudio.com/api/language-extensions/language-server-extension-guide - https://github.com/rust-analyzer/rust-analyzer