fix: strip trailing empty line when reading files

Updated the ReadFile function in 'utilities' by using the Scanner from
the bufio package to read lines from a text file. The trailing empty
line is stripped after scanning and before returning back to the caller.

internal/utilities/file.go

@@ -1,18 +1,36 @@
 package utilities
 
 import (
+	"bufio"
 	"errors"
 	"fmt"
 	"os"
 )
 
 func ReadFile(path string) (string, error) {
-	data, err := os.ReadFile(path)
+	file, err := os.Open(path)
 	if err != nil {
-		return "", fmt.Errorf("unable to read the data from the file: %w", err)
+		return "", fmt.Errorf("unable to open %q: %w", path, err)
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+
+	var lines []string
+
+	for scanner.Scan() {
+		lines = append(lines, scanner.Text())
 	}
 
-	return string(data), nil
+	if err := scanner.Err(); err != nil {
+		return "", fmt.Errorf("received an error after scanning the contents from %q: %w", path, err)
+	}
+
+	if lines[len(lines)-1] == "" {
+		lines = lines[:len(lines)-1]
+	}
+
+	return strings.Join(lines, "\n"), nil
 }
 
 func FileExists(path string) (bool, error) {