New Python Program: Basic File Manipulation

Hello Python enthusiasts! Let's expand our repository with a Python program that demonstrates basic file manipulation operations. This beginner-friendly task involves reading from and writing to text files, allowing users to create, read, update, and delete entries in a simple database file. This task will showcase file handling, loops, and conditional statements in Python.

**Tasks:**
- Create a Python program that reads data from a text file (`database.txt`) if it exists.
- Allow users to view existing entries, add new entries, update existing entries, and delete entries.
- Implement user-friendly menus and prompts for each operation.
- Ensure the program handles errors gracefully, such as invalid file access or incorrect user inputs.
- Save the updated data back to the text file after each operation.

**Guidelines:**
- Use Python 3.x for the program.
- Utilize file handling functions (`open`, `read`, `write`, `close`) to manipulate the database file.
- Include comments in your code to explain the logic and functionality.
- Test the program thoroughly, including edge cases and error scenarios.

**Example:**

```
Welcome to the Basic File Manipulation Program!

1. View Entries
2. Add Entry
3. Update Entry
4. Delete Entry
5. Exit

Select an option: 2
Enter name: John Doe
Enter age: 30
Entry added successfully!

1. View Entries
2. Add Entry
3. Update Entry
4. Delete Entry
5. Exit

Select an option: 1
Entries:
1. Name: John Doe, Age: 30

...
```

**How to Contribute:**
1. Fork this repository.
2. Create a new Python file for the Basic File Manipulation Program: `file_manipulation.py`.
3. Write the Python program following the specified tasks and guidelines.
4. Test the program thoroughly to ensure it functions correctly.
5. Commit your changes: `git commit -m "Add Basic File Manipulation Program"`
6. Push to your branch: `git push origin add-file-manipulation`
7. Open a pull request to this repository.

Your contribution will provide users with a practical understanding of file manipulation in Python. Thank you for creating this useful Python program for our repository!