feat(start): initialize project with Go scaffold

- Add basic Go application structure.- Include `.gitignore` file with common Go ignores.
- Create `main.go` with initial "Hello, World!" implementation.

main.go

@@ -8,7 +8,7 @@ var rootCmd = &cobra.Command{
 	Short: "Hello, World!",
 	Long:  `Hello, World!`,
 	Run: func(cmd *cobra.Command, args []string) {
-		fmt.Println("Hello, World!")
+		fmt.Println("Hello, World! corbra")
 	},
 }