✨ 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.

cmd/root.go

@@ -0,0 +1,140 @@
+/*
+Copyright © 2024 Nestri <>
+*/
+package cmd
+
+import (
+	_ "embed"
+	"fmt"
+	"os"
+	"strings"
+	"sync"
+
+	"github.com/nestriness/cli/pkg/specs"
+
+	"github.com/charmbracelet/lipgloss"
+	"github.com/charmbracelet/lipgloss/table"
+	"github.com/muesli/termenv"
+	"github.com/spf13/cobra"
+)
+
+//go:embed nestri.ascii
+var art string
+
+// rootCmd represents the base command when called without any subcommands
+var rootCmd = &cobra.Command{
+	Use:   "nestri",
+	Short: "A CLI tool to manage your cloud gaming service",
+	Args:  cobra.NoArgs,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		return cmd.Help()
+	},
+}
+
+var neoFetchCmd = &cobra.Command{
+	Use:   "neofetch",
+	Short: "Show important system information",
+	Args:  cobra.NoArgs,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		lipgloss.SetColorProfile(termenv.TrueColor)
+
+		// baseStyle := lipgloss.NewStyle().
+		// 	MarginTop(1).
+		// 	MarginRight(4).
+		// 	MarginBottom(1).
+		// 	MarginLeft(4)
+
+		var (
+			b      strings.Builder
+			lines  = strings.Split(art, "\n")
+			colors = []string{"#CC3D00", "#CC3D00"}
+			step   = len(lines) / len(colors)
+		)
+
+		for i, l := range lines {
+			n := clamp(0, len(colors)-1, i/step)
+			b.WriteString(colorize(colors[n], l))
+			b.WriteRune('\n')
+		}
+
+		t := table.New().
+			Border(lipgloss.HiddenBorder()).BorderStyle(lipgloss.NewStyle().Width(3))
+		//TODO: show this specs
+		// info := &specs.Specs{}
+		// infoChan := make(chan specs.Specs, 1)
+		// var wg sync.WaitGroup
+		// wg.Add(1)
+		// go getSpecs(info, infoChan, &wg)
+		// wg.Wait()
+		// newInfo := <-infoChan
+
+		t.Row(b.String())
+
+		fmt.Print(t)
+
+		return nil
+	},
+}
+
+// Execute adds all child commands to the root command and sets flags appropriately.
+// This is called by main.main(). It only needs to happen once to the rootCmd.
+func Execute() {
+	err := rootCmd.Execute()
+	if err != nil {
+		os.Exit(1)
+	}
+}
+
+func init() {
+	// Here you will define your flags and configuration settings.
+	// Cobra supports persistent flags, which, if defined here,
+	// will be global for your application.
+	rootCmd.AddCommand(neoFetchCmd)
+
+	// rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.cli.yaml)")
+
+	// Cobra also supports local flags, which will only run
+	// when this action is called directly.
+	rootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}
+
+func colorize(c, s string) string {
+	return lipgloss.NewStyle().Foreground(lipgloss.Color(c)).Render(s)
+}
+
+func clamp(v, low, high int) int {
+	if high < low {
+		low, high = high, low
+	}
+	return min(high, max(low, v))
+}
+
+func min(a, b int) int {
+	if a < b {
+		return a
+	}
+	return b
+}
+
+func max(a, b int) int {
+	if a > b {
+		return a
+	}
+	return b
+}
+
+func getSpecs(info *specs.Specs, infoChan chan specs.Specs, wg *sync.WaitGroup) {
+	defer wg.Done()
+	sys := specs.New()
+	// info.Userhost = getUserHostname()
+	// info.OS = getOSName()
+	// info.Kernel = getKernelVersion()
+	// info.Uptime = getUptime()
+	// info.Shell = getShell()
+	// info.CPU = getCPUName()
+	// info.RAM = getMemStats()
+	info.GPU, _ = sys.GetGPUInfo()
+	// info.SystemArch, _ = getSystemArch()
+	// info.DiskUsage, _ = getDiskUsage()
+	infoChan <- *info
+}