Refactor service and script paths for LightRAG.

- Renamed service file to `lightrag-server.service.example`
- Updated `ExecStart` path in service file
- Corrected README.md service file reference
- Moved `start_lightrag.sh.example` to root
- No functionality is changed

lightrag-server.service.example

@@ -9,7 +9,7 @@ User=netman
 MemoryHigh=8G
 MemoryMax=12G
 WorkingDirectory=/home/netman/lightrag-xyj
-ExecStart=/home/netman/lightrag-xyj/lightrag/api/start_lightrag_server.sh
+ExecStart=/home/netman/lightrag-xyj/start_lightrag_server.sh
 Restart=always
 RestartSec=10
 

lightrag/api/README.md

@@ -427,7 +427,7 @@ This intelligent caching mechanism:
 
 ## Install Lightrag as a Linux Service
 
-Create your service file: `lightrag.sevice`. Modified the following lines from `lightrag.sevice.example`
+Create your service file: `lightrag-server.sevice`. Modified the following lines from `lightrag-server.sevice.example`
 
 ```text
 Description=LightRAG Ollama Service