chore: Repository cleanup - Remove unnecessary files (#16)

## Summary

Repository cleanup to remove unnecessary files and streamline documentation after the successful EVPN-VXLAN lab implementation.

Closes #15

---

## Changes

### Files Removed (13 files total)

**Scripts folder:**
- `scripts/deploy.sh`
- `scripts/test-connectivity.sh`
- `scripts/cleanup.sh`

**Root-level markdown files:**
- `BRANCH_SUMMARY.md`
- `BUGFIX_EVPN_ACTIVATION.md`
- `DEPLOYMENT_GUIDE.md`
- `FIXES_APPLIED.md`
- `TESTING_CHECKLIST.md`
- `VLAN_TAGGING_FIX_EXPLANATION.md`

**docs/ folder (entire folder removed):**
- `docs/HOST_INTERFACE_CONFIGURATION.md`
- `docs/configuration-guide.md`
- `docs/quick-reference.md`
- `docs/validation-commands.md`

### Files Updated
- `hosts/README.md` - Fixed broken links
- `README.md` - Updated repository structure section

---

## Final Repository Structure

```
├── .gitignore
├── README.md                    # Main documentation
├── TROUBLESHOOTING.md           # Troubleshooting guide
├── END_TO_END_TESTING.md        # Testing procedures
├── evpn-lab.clab.yml            # ContainerLab topology
├── configs/                     # Switch configurations (10 files)
└── hosts/                       # Host interface configs (5 files)
```

---

## Testing

- [x] Lab redeployed successfully with `containerlab deploy -t evpn-lab.clab.yml`
- [x] L2 VXLAN connectivity verified (host1 ↔ host3)
- [x] L3 VXLAN connectivity verified (host2 ↔ host4)
- [x] All BGP EVPN sessions established
- [x] MLAG pairs operational

Reviewed-on: #16

README.md

@@ -14,7 +14,7 @@ This lab demonstrates a complete EVPN-VXLAN data center fabric with:
 ## 📐 Topology
 
 ```
-                    ┌─────────┐  ┌─────────┐
+                    ┌──────────┐  ┌──────────┐
                     │ Spine1  │  │ Spine2  │
                     │ AS65000 │  │ AS65000 │
                     └────┬────┘  └────┬────┘
@@ -218,7 +218,9 @@ show mac address-table
 ```
 arista-evpn-vxlan-clab/
 ├── README.md                    # This file
-├── evpn-lab.clab.yml           # ContainerLab topology
+├── TROUBLESHOOTING.md           # Troubleshooting guide
+├── END_TO_END_TESTING.md        # Testing procedures
+├── evpn-lab.clab.yml            # ContainerLab topology
 ├── configs/                     # Device configurations
 │   ├── spine1.cfg
 │   ├── spine2.cfg
@@ -230,24 +232,22 @@ arista-evpn-vxlan-clab/
 │   ├── leaf6.cfg
 │   ├── leaf7.cfg
 │   └── leaf8.cfg
-├── docs/                        # Documentation
-│   ├── configuration-guide.md
-│   ├── validation-commands.md
-│   └── topology-diagram.png
-└── scripts/                     # Helper scripts
-    ├── deploy.sh
-    ├── test-connectivity.sh
-    └── cleanup.sh
+└── hosts/                       # Host interface configurations
+    ├── README.md
+    ├── host1_interfaces
+    ├── host2_interfaces
+    ├── host3_interfaces
+    └── host4_interfaces
 ```
 
-## 🔧 Cleanup
+## 🗑️ Cleanup
 
 ```bash
 # Destroy the lab
 sudo containerlab destroy -t evpn-lab.clab.yml
 
 # Remove all related containers and networks
-sudo containerlab destroy --cleanup
+sudo containerlab destroy -t evpn-lab.clab.yml --cleanup
 ```
 
 ## 📚 References