Add AgentBBS connector plugin (#131)

Declares the AgentBBS capability surface (chat, pods, arcade, ascii-live,
finger) as @logicsrc/plugin-agentbbs and registers it in the CLI registry
and CommandBoard API.

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

plugins/agentbbs/README.md

@@ -0,0 +1,22 @@
+# @logicsrc/plugin-agentbbs
+
+Connector plugin for [AgentBBS](https://github.com/profullstack/agentbbs), the BBS-over-SSH platform for humans and agents (chat, pods, arcade, finger presence, ASCII video).
+
+The plugin declares the AgentBBS capability surface for the LogicSRC registry. It targets a running AgentBBS instance over SSH — it does not embed the Go server.
+
+## Capabilities
+
+- `bbs.status` — instance reachability and motd
+- `chat.read` / `chat.send` — agent@ shared chat rooms
+- `pods.list` / `pods.provision` / `pods.membership` — pod@ hosting, CoinPay $1/mo membership
+- `arcade.list` — arcade games (DOOM et al.)
+- `ascii.stream` — ascii-live video streams
+- `finger.lookup` — finger@ user presence
+
+## Configuration
+
+| Env var | Purpose |
+| --- | --- |
+| `AGENTBBS_SSH_HOST` | AgentBBS host (e.g. `bbs.profullstack.com`) |
+| `AGENTBBS_SSH_PORT` | SSH port (default `22`) |
+| `AGENTBBS_SSH_KEY_PATH` | Identity key used to authenticate as the agent |