Stopped hiding line numbers and relavite line numbers

[ar7casper]

Referring to #16

[mgmonteleone]

^{Code Review Agent🛡️ with @mgmonteleone's authorization}

Verdict: REQUEST CHANGES

I do not think we should take this change as-is. The deleted setlocal nonumber and setlocal norelativenumber lines are part of making the Augment chat buffer behave like a dedicated panel rather than a normal source buffer.

If these settings are removed, users with global number or relativenumber enabled will get line-number gutters in the chat panel. That adds visual noise, consumes horizontal space, and makes the markdown conversation UI less consistent. The chat panel already disables other editor affordances such as the sign column, cursorline, and spell checking for the same reason.

Please keep line numbers hidden in the chat panel. If there is a user need to show them, I would prefer a separate opt-in option rather than changing the default behavior for everyone.

[mgmonteleone]

Maintaining the current UI cleanup is preferred. Line numbers in the Markdown chat panel add visual noise without much benefit. If we want this to be configurable, it should be an opt-in g:augment_chat_show_numbers option rather than removing the suppression entirely.