Add cursor animation when WezTerm supports it. ## Configuration ```lua config.enable_cursor_animation = true config.cursor_animation_duration_ms = 150 config.cursor_trail_opacity = 0.4 ``` ## Upstream Tracking - Issue: https://github.com/wezterm/wezterm/issues/7387 - PR: https://github.com/wezterm/wezterm/pull/7420