docs: enrich root README with full project plan details

- Add project plan context: team members, executive summary, schedule, risk management
- Add project scope, deliverables, and classification table with symptoms
- Add bibliography/references section from project plan
- Centered header with logo, emoji-section navigation
- Cleaner structure: Tentang → Tim → Ringkasan → Cakupan → Jadwal → Risiko → Arsitektur → Tech Stack → Memulai → Dokumentasi → Pustaka

Co-Authored-By: Claude <noreply@anthropic.com>

.github/assets/zeavis-logo.svg

@@ -0,0 +1,25 @@
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