Add Option to Exit Program & Update Documentation (#1)

* Feat Option to Exit Program

- [+] feat: add option to exit program at each input prompt
- [+] The program now allows the user to type 'exit' at each input prompt to quit the program gracefully.

* Docs [README] Update Documentation

- [+] docs(README.md): remove duplicate csr from pkg.go.dev URL

Author: H0llyW00dzZ

README.md

@@ -1,6 +1,6 @@
 # CSR Generator
 
-[![Go Reference](https://pkg.go.dev/badge/github.com/H0llyW00dzZ/csr-generator/csr.svg)](https://pkg.go.dev/github.com/H0llyW00dzZ/csr-generator/csr)
+[![Go Reference](https://pkg.go.dev/badge/github.com/H0llyW00dzZ/csr-generator/csr.svg)](https://pkg.go.dev/github.com/H0llyW00dzZ/csr-generator)
 
 The CSR Generator is a Go package that provides functionality for generating Certificate Signing Requests (CSRs) and private keys. It simplifies the process of creating CSRs with specified common names and Subject Alternative Names (SANs).
 

run.go

@@ -18,23 +18,40 @@ import (
 func main() {
 	reader := bufio.NewReader(os.Stdin)
 
-	fmt.Print("Enter the common name (domain name): ")
+	fmt.Print("Enter the common name (domain name) or type 'exit' to quit: ")
 	commonName, _ := reader.ReadString('\n')
 	commonName = strings.TrimSpace(commonName)
 
-	fmt.Print("Enter the number of Subject Alternative Names (SANs): ")
+	if commonName == "exit" {
+		fmt.Println("Exiting the program.")
+		return
+	}
+
+	fmt.Print("Enter the number of Subject Alternative Names (SANs) or type 'exit' to quit: ")
 	sanCountStr, _ := reader.ReadString('\n')
 	sanCountStr = strings.TrimSpace(sanCountStr)
+
+	if sanCountStr == "exit" {
+		fmt.Println("Exiting the program.")
+		return
+	}
+
 	sanCount, err := strconv.Atoi(sanCountStr)
 	if err != nil {
 		log.Fatalf("Invalid number of SANs: %v", err)
 	}
 
 	var dnsNames []string
 	for i := 0; i < sanCount; i++ {
-		fmt.Printf("Enter SAN %d (DNS name): ", i+1)
+		fmt.Printf("Enter SAN %d (DNS name) or type 'exit' to quit: ", i+1)
 		dnsName, _ := reader.ReadString('\n')
 		dnsName = strings.TrimSpace(dnsName)
+
+		if dnsName == "exit" {
+			fmt.Println("Exiting the program.")
+			return
+		}
+
 		dnsNames = append(dnsNames, dnsName)
 	}