chore: rename cameleer3 to cameleer

Rename Java packages from net.siegeln.cameleer3 to net.siegeln.cameleer,
update all references in workflows, Docker configs, docs, and bootstrap.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docs/superpowers/plans/2026-04-09-saas-ux-polish-plan.md

@@ -581,7 +581,7 @@ In `ui/sign-in/src/SignInPage.tsx`, find the logo text (line ~61):
 // BEFORE:
 <div className={styles.logo}>
   <img src={cameleerLogo} alt="" className={styles.logoImg} />
-  cameleer3
+  cameleer
 </div>
 
 // AFTER: