Clean up README.md by removing duplicate sections

Removed duplicate sections regarding official vendor docs and snapshots from the repository structure.

Author: kakarotoncloud

README.md

@@ -102,6 +102,8 @@ You only replace the placeholders. Nothing else.
 ## 📁 Repository structure (easy guide)
 
 prompts/ ├─ general/        → coding, debugging, system design ├─ workplace/      → emails, meetings, project plans ├─ data/           → data analysis and cleaning ├─ mech/           → mechanical engineering prompts ├─ agents/         → agent and tool-use templates ├─ by-platform/    → ChatGPT / Claude / Gemini wrappers └─ index.md        → full prompt list (START HERE)
+official/ └─ vendor docs     → official AI sources (tracked)
+snapshots/ └─ dated history   → weekly change history
 
 
 New users should start with `prompts/index.md`.
@@ -200,7 +202,5 @@ If this repo helped you:
 - suggest improvements
 
 
-official/ └─ vendor docs     → official AI sources (tracked)
-snapshots/ └─ dated history   → weekly change history