Have a non blinking cursor.

### Description

I found the quickly blinking cursor stressing/disturbing. I found on the internet that setting `0` can make it non blinking but it makes it disappear entirely.

### Use case/motivation

I would like an option for a non-blinking cursor because it makes it more comfortable to use in my opinion.

### Related issues

_No response_

### Are you willing to submit a pull request?

No

Start by tracing the NetBeans caret-blink-rate setting described in the issue and identify where the editor cursor behavior is configured. Verify how a zero value is handled, then confirm that the resulting option keeps the cursor visible without blinking.

Written by the indexing model from the issue text.