Rename Hightower components to Trebuchet

- Rename npm packages: @shannon/api -> @trebuchet/api, @shannon/worker -> @trebuchet/worker, @keygraph/shannon -> @trebuchet/cli
- Update CLI references from shannon/keygraph to trebuchet/trebuchet
- Update Dockerfile and CLAUDE.md to reflect new package names
- Update TypeScript imports in API to use @trebuchet/worker

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/cli/src/commands/setup.ts

@@ -37,7 +37,7 @@ export async function setup(): Promise<void> {
 
   const configPath = path.join(SHANNON_HOME, 'config.toml');
   p.log.success(`Configuration saved to ${configPath}`);
-  p.outro('Run `npx @keygraph/shannon start` to begin a scan.');
+  p.outro('Run `npx @trebuchet/cli start` to begin a scan.');
 }
 
 async function setupProvider(provider: Provider): Promise<ShannonConfig> {