chore: add initial release changeset

Author: coopbri

.changeset/initial-release.md

@@ -0,0 +1,13 @@
+---
+"beacon-gateway": minor
+---
+
+Lighting the beacon
+
+- Multi-channel AI assistant gateway — voice, Discord, Telegram, Slack, and WebSocket
+- Built-in sandboxed shell execution tool with timeout and PATH augmentation
+- Skill management with compact prompt injection and on-demand skill reading
+- Per-channel tool policy enforcement
+- Memory tools for persistent, session-spanning context
+- Cron scheduling for automated tasks
+- Plugin extensibility via MCP