Checkpoints Milestone 3
1. Paging 📟
- Paging Data Structures✅
- Higher Half Kernel ✅
- Activate Paging ✅
2. User Mode 👨💻👩💻
- External Program-Inserter✅
- User GDT & Task Segment State ✅
- Simple Memory Allocator ✅
- Simple User Program ✅
- Execute Program ✅
- Launching User Mode ✅
3. Shell 🖥
- System Calls ✅
- Shell Implementation ✅