feat(#756): add official Discord channel adapter

plugins/discord/vitest.config.ts

@@ -4,5 +4,15 @@ export default defineConfig({
   test: {
     globals: true,
     environment: 'node',
+    coverage: {
+      provider: 'v8',
+      reporter: ['text', 'json', 'html'],
+      thresholds: {
+        lines: 85,
+        functions: 85,
+        branches: 85,
+        statements: 85,
+      },
+    },
   },
 });