Add attachments to comments

[jonathon]

API post comments with attached files

Hey @Sandra, this took a while longer than I had hoped. Nevertheless, this is an example of attaching files to new comments. I include below C# code to achieve this. I could post javascript afterwards though it has a few gotchas to work around that I mention later. The first step is to set the server (host_url) and a personal access token (token), if we are not relying on a local installation using Speckle Manager to handle accounts. string host_url = "HOST_SERVER"; string token = "ACCESS_TOK…