add memory stats

app/mem/drivers/drivers.go

@@ -0,0 +1,28 @@
+package drivers
+
+// MemoryUsage holds live RAM stats from /proc/meminfo
+type MemoryUsage struct {
+	TotalGB     float64
+	AvailableGB float64
+	UsedGB      float64
+	UsedPercent float64
+}
+
+type UsageDriver interface {
+	ReadUsageSensors() (MemoryUsage, error)
+}
+
+// MemoryHardware holds physical RAM slot and module details
+type MemoryHardware struct {
+	MaxCapacityGB float64
+	TotalSlots    int
+	SlotsUsed     int
+	Generations   []string
+	Speeds        []string
+	FormFactors   []string
+	ModelNames    []string
+}
+
+type HardwareDriver interface {
+	ReadHardwareSensors() (MemoryHardware, error)
+}