`debug` mode

[saghen]

Feature Description

Add a debug = true option and add logging to assist in debugging. Some ideas of what to log:

• Configuration on startup
• Whether it's using a prebuilt binary or locally built
• Completion item during accept
• Enabled providers

[barries]

Another helpful debug would be what the LSP's completion spec is; specifically, I'm trying to find out if rustanalyzer, blink.cmp, or nvim is responsible for deleting the word following a suggestion; VSCode apparently doesn't behave that way, FWIW.

So, I'd love to log or print the actual replacement.

[saghen]

Sounds like you're looking for #1736. There's an explanation of why the issue occurs in there