feat: init pc-monitor project

- Client: Go-based Windows hardware monitoring (CPU, GPU, memory, disk, network, power)
- Server: Go + Gin + SQLite backend with REST API
- Frontend: Vue 3 + Element Plus dashboard
- Docker deployment support
- Windows service installation script

server/go.mod

@@ -0,0 +1,9 @@
+module pc-monitor-server
+
+go 1.21
+
+require (
+	github.com/gin-gonic/gin v1.9.1
+	github.com/mattn/go-sqlite3 v1.14.22
+	gopkg.in/yaml.v3 v3.0.1
+)