NewRWC creates a new RWC with custom reader and writer.

NewStdRWC creates a new RWC using standard input/output.

LocationLink is an implementation of the LocationLink LSP type https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#locationLink https://github.com/sourcegraph/go-lsp does not support the LocationLink Type so we have implemented it here for lua-language-server.