[FEATURE]: add opencode-terminal-bell-notifier to ecosystem plugins #18973

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Describe the enhancement you want to request

Hi! I wanted to add my plugin opencode-terminal-bell-notifier to the ecosystem list.

It is a zero-dependency plugin that sends desktop notifications using OSC 9 terminal escape sequences. It supports both Bun and Node.js.

How it works:
The plugin writes an OSC 9 escape sequence directly to stdout:

\x1b]9;<message>\x07

Terminal emulators that support OSC 9 (Ghostty, iTerm2, kitty, foot, Windows Terminal, Warp) display this as a native desktop notification. Terminals without OSC 9 support still fire the trailing BEL byte (\x07) as an audible or visual bell.