✨ feat: Write cli executable as a go program (#4)

## Description

**What issue are you solving (or what feature are you adding) and how
are you doing it?**
I have opted to go with Golang as it has inbuilt support for writing
cross-platform executables unlike something like JS. And also, it has
support for running docker using the unix socket directly in code.

pkg/specs/system.go

@@ -0,0 +1,76 @@
+package specs
+
+import (
+	"fmt"
+	"os/exec"
+	"runtime"
+	"strings"
+)
+
+type SysSpecs struct {
+	osx string
+}
+
+func New() *SysSpecs {
+	return &SysSpecs{osx: runtime.GOOS}
+}
+
+func (s SysSpecs) GetGPUInfo() (string, error) {
+	var output []byte
+	var err error
+
+	switch s.osx {
+	case "windows":
+		output, err = exec.Command("wmic", "path", "win32_VideoController", "get", "name").Output()
+		if err != nil {
+			return "", fmt.Errorf("error retrieving GPU information on Windows: %v", err)
+		}
+	case "darwin":
+		output, err = exec.Command("system_profiler", "SPDisplaysDataType").Output()
+		if err != nil {
+			return "", fmt.Errorf("error retrieving GPU information on macOS: %v", err)
+		}
+	case "linux":
+		output, err = exec.Command("lspci", "-vnn").Output()
+		if err != nil {
+			return "", fmt.Errorf("error retrieving GPU information on Linux: %v", err)
+		}
+	default:
+		return "", fmt.Errorf("error: GPU information retrieval not implemented for %s", runtime.GOOS)
+	}
+
+	outputStr := strings.TrimSpace(string(output))
+
+	if s.osx == "windows" {
+		lines := strings.Split(outputStr, "\r\n")[1:]
+		gpuName := strings.TrimSpace(strings.Join(lines, " "))
+		return gpuName, nil
+	}
+
+	if s.osx == "darwin" {
+		lines := strings.Split(outputStr, "\n")
+		for _, line := range lines {
+			if strings.Contains(line, "Chipset Model:") {
+				fields := strings.Split(line, ":")
+				if len(fields) >= 2 {
+					gpuName := strings.TrimSpace(fields[1])
+					return gpuName, nil
+				}
+			}
+		}
+		return "", fmt.Errorf("error parsing GPU information on macOS")
+	}
+
+	lines := strings.Split(outputStr, "\n")
+
+	for _, line := range lines {
+		if strings.Contains(line, "VGA compatible controller") {
+			fields := strings.Fields(line)
+			if len(fields) > 2 {
+				gpuName := strings.Join(fields[2:], " ")
+				return gpuName, nil
+			}
+		}
+	}
+	return "", fmt.Errorf("error parsing GPU information on Linux")
+}