* refactor(core): return 200 on any IPC call, closes#10286
By default the webview prints a `Failed to load resource: the server responded with a status of 400 (Bad Request) ipc://localhost` error message when a command returns an error, which is confusing to users.
This changes the IPC to return status 200 on any call, with a header to indicate whether the result was ok or not. This removes the console error, which would only log the actual error result if it isn't caught by the user.
* add change file
* apply code review changes
